dt is conditionalized to run on Tru64 UNIX, HP-UX, SUN, ULTRIX, OSF/MK, QNX, Linux, MacOS & FreeBSD, SCO Unixware, and Windows operating systems.
dt command lines are similar to the dd program, which is popular on most UNIX systems. dt provides a flexible set of options to create simple to complex workloads.
dt has been used to successfully test disks, tapes, serial lines, parallel lines, pipes, and memory mapped files. In fact, dt can be used for any device that allows the standard open, read, write, and close system calls. Special support is necessary for some devices, such as serial lines, for setting up the speed, parity, data bits, etc.
Please Note: dt is no longer built with tape or serial line support.
Send mail to admin of this page: Robin.T.Miller@gmail.com
Last modified: November 10th, 2025
% ./dt help (Windows help text, may vary by operating system)
Usage: dt options...
Where options are:
if=filename The input file to read.
of=filename The output file to write.
sdsf=filename The SCSI device special file.
tdsf=filename The SCSI trigger device file.
pf=filename The data pattern file to use.
dir=dirpath The directory path for files.
dirp=string The directory prefix for subdirs.
filepostfix=str The file postfix. (D: j%jobt%thread)
sdirs=value The number of subdirectories.
depth=value The subdirectory depth.
bs=value The block size to read/write.
or bs=random Random sizes between 512 and 1048576 bytes.
ibs=value The read block size. (overrides bs=)
obs=value The write block size. (overrides bs=)
job_log=filename The job log file name. (alias: jlog=)
logdir=filename The log directory name.
log[atu]=filename The thread log file name to write.
a=append, t=truncate, u=unique (w/tid)
logprefix=string The per line logging prefix.
error_log=filename The error log file name. (alias: elog=)
master_log=filename The master log file name. (alias: mlog=)
reread_file=filename The reread file name.
aios=value Set number of AIO's to queue.
alarm=time The keepalive alarm time.
keepalive=string The keepalive message string.
keepalivet=time The keepalive message frequency.
pkeepalive=str The pass keepalive message string.
tkeepalive=str The totals keepalive message string.
align=offset Set offset within page aligned buffer.
or align=rotate Rotate data address through sizeof(ptr).
capacity=value Set the device capacity in bytes.
or capacity=max Set maximum capacity from disk driver.
capacityp=value Set capacity by percentage (range: 0-100).
bufmodes={buffered,unbuffered,cachereads,cachewrites}
Set one or more buffering modes. (Default: none)
boff=string Set the buffer offsets to: dec or hex. (Default: hex)
dfmt=string Set the data format to: byte or word. (Default: word)
dispose=mode Set file dispose to: {delete, keep, or keeponerror}.
dlimit=value Set the dump data buffer limit.
dtype=string Set the device type being tested.
idtype=string Set input device type being tested.
odtype=string Set output device type being tested.
dsize=value Set the device block (sector) size.
errors=value The number of errors to tolerate.
files=value Set number of disk/tape files to process.
maxfiles=value The maximum files for all directories.
ffreq=value The frequency (in records) to flush buffers.
fstrim_freq=value The file system trim frequency (in files).
fill_pattern=value The write fill pattern (32 bit hex).
prefill_pattern=value The read prefill pattern (32 bit hex).
flow=type Set flow to: none, cts_rts, or xon_xoff.
incr=value Set number of record bytes to increment.
or incr=variable Enables variable I/O request sizes.
iops=value Set I/O per second (this is per thread).
iodir=direction Set I/O direction to: {forward, reverse, or vary}.
iomode=mode Set I/O mode to: {copy, mirror, test, or verify}.
iotype=type Set I/O type to: {random, sequential, or vary}.
iotpass=value Set the IOT pattern for specified pass.
iotseed=value Set the IOT pattern block seed value.
iotune=filename Set I/O tune delay parameters via file.
history=value Set the number of history request entries.
history_bufs=value Set the history data buffers (per request).(or hbufs)
history_bsize=value Set the history block data size increment. (or hbsize)
history_data=value Set the history data size (bytes to save). (or hdsize)
min=value Set the minumum record size to transfer.
max=value Set the maximum record size to transfer.
lba=value Set starting block used w/lbdata option.
lbs=value Set logical block size for lbdata option.
limit=value The number of bytes to transfer (data limit).
or limit=random Random data limits between 10485760 and 2147483648 bytes.
incr_limit=value Set the data limit increment.
or incr_limit=variable Enables variable file sizes.
min_limit=value Set the minumum data limit.
max_limit=value Set the maximum data limit.
maxdata=value The maximum data limit (all files).
maxdatap=value The maximum data percentage (range: 0-100).
flags=flags Set open flags: {excl,sync,...}
oflags=flags Set output flags: {append,trunc,...}
vflags=flags Set/clear btag verify flags. {lba,offset,...}
maxbad=value Set maximum bad blocks to display. (Default: 25)
onerr=action Set error action: {abort, continue, or pause}.
nice=value Apply the nice value to alter our priority.
noprogt=value Set the no progress time (in seconds).
noprogtt=value Set the no progress trigger time (secs).
notime=optype Disable timing of specified operation type.
parity=string Set parity to: {even, odd, or none}.
pass_cmd=string The per pass command to execute.
passes=value The number of passes to perform.
pattern=value The 32 bit hex data pattern to use.
or pattern=iot Use DJ's IOT test pattern.
or pattern=incr Use an incrementing data pattern.
or pattern=string The string to use for the data pattern.
position=offset Position to offset before testing.
oposition=offset The output file position (copy/verify).
prefix=string The data pattern prefix string.
procs=value The number of processes to create.
ralign=value The random I/O offset alignment.
rlimit=value The random I/O data byte limit.
rseed=value The random number generator seed.
records=value The number of records to process.
readp=value Percentage of accesses that are reads. Range [0,100].
'random' keyword makes the read/write percentage random.
randp=value Percentage of accesses that are random. Range [0,100].
Sequential accesses = 0%, else random percentage
rrandp=value Percentage of read accesses that are random. Range [0,100].
wrandp=value Percentage of write accesses that are random. Range [0,100].
runtime=time The number of seconds to execute.
script=filename The script file name to execute.
slices=value The number of disk slices.
slice=value Choose a specific disk slice.
soffset=value The starting slice offset.
skip=value The number of records to skip past.
seek=value The number of records to seek past.
step=value The number of bytes seeked after I/O.
stats=level The stats level: {brief, full, or none}
stopon=filename Watch for file existence, then stop.
sleep=time The sleep time (in seconds).
msleep=value The msleep time (in milliseconds).
usleep=value The usleep time (in microseconds).
showbtags opts... Show block tags and btag data.
showfslba Show file system offset to physical LBA.
showfsmap Show file system map extent information.
showtime=value Show time value in ctime() format.
showvflags=value Show block tag verify flags set.
threads=value The number of threads to execute.
trigger={br, bdr, lr, seek, cdb:bytes, cmd:str, and/or triage}
The triggers to execute on errors.
trigger_action=value The trigger action (for noprogs).
trigger_on={all, errors, miscompare, or noprogs} (Default: all)
The trigger control (when to execute).
volumes=value The number of volumes to process.
vrecords=value The record limit for the last volume.
enable=flag Enable one or more of the flags below.
disable=flag Disable one or more of the flags below.
help Display this help text.
eval EXPR Evaluate expression, show values.
system CMD Execute a system command.
!CMD Same as above, short hand.
shell Startup a system shell.
usage Display the program usage.
version Display the version information.
I/O Behaviors:
iobehavior=type Specify the I/O behavior. (alias: iob=)
Where type is:
dt The dt I/O behavior (default).
dtapp The dtapp I/O behavior.
hammer The hammer I/O behavior.
sio The simple I/O (sio) behavior.
For help on each I/O behavior use: "iobehavior=type help"
Latency Options:
latfreq=value Report latency frequency (in records).
Note: This reports per I/O latency.
latmin=value The minimum latency (in microseconds).
latmax=value The maximum latency (in microseconds).
Block Tag Verify Flags: (prefix with ~ to clear flag)
lba,offset,devid,inode,serial,hostname,signature,version
pattern_type,flags,write_start,write_secs,write_usecs,
pattern,generation,process_id,thread_number,device_size
record_index,record_size,record_number,step_offset,
opaque_data_type,opaque_data_size,crc32
default Disk: lba,devid,serial + common
default File: offset,inode + common flags
common Flags: hostname,signature,write_start,generation,
prcoess_id,job_id,thread_number,crc32
Example: verifyFlags= or vflags=~all,lba,crc32
Force Corruption Options:
corrupt_index=value The corruption index. (Default: random)
corrupt_length=value The corruption length. (Default: 4 bytes)
corrupt_pattern=value The corruption pattern. (Default: 0xfeedface)
corrupt_step=value Corruption buffer step. (Default: 0 bytes)
corrupt_reads=value Corrupt at read records. (Default: 13)
corrupt_writes=value Corrupt at write records. (Default: 0)
Job Start Options:
istate={paused,running} (Default: running)
Initial state after thread created.
tag=string Specify job tag when starting tests.
Job Control Options:
jobs[:full][={jid|tag}] | [job=value] | [tag=string]
Show all jobs or specified job.
cancelall Cancel all jobs.
cancel={jid|tag} | [job=value] | [tag=string]
Cancel the specified job ID.
modify[={jid|tag}] | [job=value] | [tag=string] [modify_options]
Modify all jobs or specified job.
pause[={jid|tag}] | [job=value] | [tag=string]
Pause all jobs or specified job.
query[={jid|tag}] | [job=value] | [tag=string] [query_string]
Query all jobs or specified job.
resume[={jid|tag}] | [job=value] | [tag=string]
Resume all jobs or specified job.
stopall Stop all jobs.
stop={jid|tag} | [job=value] | [tag=string]
Stop the specified job.
wait[={jid|tag}] | [job=value] | [tag=string]
Wait for all jobs or specified job.
File System Map Format:
showfslba [bs=value] [count=value] [limit=value] [offset=value]
Show FS offset(s) mapped to physical LBA(s)
The default is to show LBA for specified offset.
showfsmap [bs=value] [count=value] [limit=value] [offset=value]
Show the file system map extent information.
The default is to show the full extent map.
File Locking Options:
enable=lockfiles Enables file locks (locks & unlocks)
lockmode={mixed | full | partial}
Chance of full or partial file locks (default: mixed).
unlockchance=[0-100] Probability of keeping locks and skipping unlocking.
Examples:
unlockchance=100 100% chance of unlocking, ALL files unlocked. [default]
unlockchance=50 50% chance of unlocking each file.
unlockchance=0 0% chance of unlocking, NO files are unlocked.
Workload Options:
define workloadName options...
Define a workload with options.
workloads [substr]
Display the valid workloads.
workload=name Select the specified workload.
File System Full Options:
fsfree_delay=value FS free space sleep delay. (Def: 3 secs)
fsfree_retries=value FS free space wait retries. (Def: 10)
Please consider adding the truncate flag or enable=deleteperpass,
to free space between passes or with multiple threads to same FS.
Retry Related Options:
retry_error=value The error code to retry.
retry_delay=value The retry delay. (Def: 5 secs)
retry_limit=value The retry limit. (Def: 60)
retryDC_delay=value The retry corruptions delay. (Def: 5)
retryDC_limit=value The retry corruptions limit. (Def: 1)
Error Strings Accepted:
EIO (5), ENXIO (6), EBUSY (16), ENODEV (19), ENOSPC (28), ESTALE (116)
OR
retry_error='*' or -1 to retry all errors.
SCSI Specific Options:
idt=string The Inquiry device type. (both, device, or serial)
spt_path=string Path to SCSI (spt) tool.
spt_options=string Additional spt options.
readtype=string The SCSI read type (read8, read10, read16).
writetype=string The SCSI write type (write8, write10, write16, writev16).
scsi_recovery_delay=value The SCSI recovery delay. (Def: 2 secs)
scsi_recovery_retries=value The SCSI recovery retries.(Def: 60)
scsi_timeout=value The SCSI timeout (in ms). (Def: 0ms)
unmap_freq=value The SCSI unmap frequency. (Def: 0)
unmap=type The SCSI unmap type.
Valid types are: random, unmap, write_same, zerorod.
Flags to enable/disable:
aio POSIX Asynchronous I/O. (Default: disabled)
async Asynchronous job control. (Default: disabled)
btags Block tag control flag. (Default: disabled)
compare Data comparison flag. (Default: enabled)
xcompare Extra btag prefix compare. (Default: disabled)
coredump Core dump on errors. (Default: disabled)
deleteerrorlog Delete error log file. (Default: enabled)
deleteperpass Delete files per pass. (Default: disabled)
debug Debug output. (Default: disabled)
Debug Verbose debug output. (Default: disabled)
btag_debug Block tag (btag) debug. (Default: disabled)
edebug End of file debug. (Default: disabled)
fdebug File operations debug. (Default: disabled)
jdebug Job control debug. (Default: disabled)
ldebug File locking debug. (Default: disabled)
mdebug Memory related debug. (Default: disabled)
mntdebug Mount device lookup debug. (Default: disabled)
pdebug Process related debug. (Default: disabled)
rdebug Random debug output. (Default: disabled)
tdebug Thread debug output. (Default: disabled)
timerdebug Timer debug output. (Default: disabled)
dump Dump data buffer. (Default: enabled)
dumpall Dump all blocks. (Default: disabled)
dump_btags Dump block tags (btags). (Default: disabled)
dump_context Dump good context block. (Default: enabled)
errors Report errors flag. (Default: disabled)
xerrors Report extended errors. (Default: enabled)
eof EOF/EOM exit status. (Default: disabled)
fileperthread File per thread. (Default: enabled)
fill_always Always fill files. (Default: disabled)
fill_once Fill the file once. (Default: disabled)
fsalign File system align. (Default: disabled)
fsmap File system map control. (Default: enabled)
fstrim File system trim. (Default: disabled)
funique Unique output file. (Default: disabled)
fsincr File size incrementing. (Default: disabled)
fsync Controls file sync'ing. (Default: runtime)
header Log file header. (Default: disabled)
trailer Log file trailer. (Default: enabled)
force-corruption Force a FALSE corruption. (Default: disabled)
hdump History dump. (Default: disabled)
htiming History timing. (Default: disabled)
image Image mode copy (disks). (Default: disabled)
iolock I/O lock control. (Default: disabled)
lbdata Logical block data. (Default: disabled)
logpid Log process ID. (Default: disabled)
lockfiles Lock files. (Default: disabled)
looponerror Loop on error. (Default: disabled)
microdelay Microsecond delays. (Default: disabled)
msecsdelay Millisecond delays. (Default: disabled)
secsdelay Second delays. (Default: disabled)
mmap Memory mapped I/O. (Default: disabled)
mount_lookup Mount device lookup. (Default: enabled)
multi Multiple volumes. (Default: disabled)
noprog No progress check. (Default: disabled)
pipes Pipe mode control flag. (Default: disabled)
poison Poison read buffer flag. (Default: disabled)
prefill Prefill read buffer flag. (Default: runtime)
job_stats The job statistics flag. (Default: disabled)
pstats The per pass statistics. (Default: enabled)
total_stats The total statistics. (Default: enabled)
raw Read after write. (Default: disabled)
reread Re-read after raw. (Default: disabled)
resfsfull Restart file system full. (Default: enabled)
readcache Read cache control. (Default: enabled)
writecache Write cache control. (Default: enabled)
retryDC Retry data corruptions. (Default: enabled)
retrydisc Retry session disconnects. (Default: disabled)
retrywarn Retry logged as warning. (Default: disabled)
savecorrupted Save corrupted data. (Default: enabled)
scriptverify Script verify display. (Default: disabled)
sighup Hangup signal control. (Default: enabled)
nvme_io NVMe I/O operations. (Default: disabled)
scsi SCSI operations. (Default: enabled)
scsi_info SCSI information. (Default: enabled)
scsi_io SCSI I/O operations. (Default: disabled)
sdebug SCSI debug output. (Default: disabled)
scsi_errors SCSI error logging. (Default: disabled)
scsi_recovery SCSI recovery control. (Default: enabled)
unmap SCSI unmap per pass. (Default: disabled)
get_lba_status SCSI Get LBA Status. (Default: disabled)
fua SCSI Force unit access. (Default: disabled)
dpo SCSI Disable page out. (Default: disabled)
stats Display statistics. (Default: enabled)
stopimmed Stop immediate w/stop file.(Default: enabled)
syslog Log errors to syslog. (Default: disabled)
terminate_on_signals Terminate on signals. (Default: disabled)
timestamp Timestamp each block. (Default: disabled)
trigargs Trigger cmd arguments. (Default: enabled)
trigdefaults Automatic trigger defaults.(Default: enabled)
trigdelay Delay mismatch triggers. (Default: enabled)
unique Unique pattern. (Default: enabled)
uuid_dashes Dashes in UUID strings. (Default: enabled)
verbose Verbose output. (Default: enabled)
verify Verify data written. (Default: enabled)
Example: enable=debug disable=compare,pstats
Common Open Flags:
none Clear all user set flags.
excl (O_EXCL) Exclusive open. (don't share)
ndelay (O_NDELAY) Non-delay open. (don't block)
nonblock (O_NONBLOCK) Non-blocking open/read/write.
direct (O_DIRECT) Direct disk access. (don't cache data).
nodirect Cache data (disables Direct I/O).
fsync (O_FSYNC) Sync both read/write data with disk file.
rsync (O_RSYNC) Synchronize read operations.
sync (O_SYNC) Sync updates for data/file attributes.
large (O_LARGEFILE) Enable large (64-bit) file system support.
Output Open Flags:
none Clear all user set flags.
append (O_APPEND) Append data to end of existing file.
dsync (O_DSYNC) Sync data to disk during write operations.
trunc (O_TRUNC) Truncate an existing file before writing.
Delays (Values are seconds, unless micro/msecs delay is enabled):
open_delay=value Delay before opening the file. (Default: 0)
close_delay=value Delay before closing the file. (Default: 0)
delete_delay=value Delay after deleting files. (Default: 0 secs)
end_delay=value Delay between multiple passes. (Default: 0 secs)
forced_delay=value Force random I/O delay (noprog). (Default: 0 secs)
start_delay=value Delay before starting the test. (Default: 0 secs)
read_delay=value Delay before reading each record. (Default: 0)
verify_delay=value Delay before verifying data. (Default: 0)
write_delay=value Delay before writing each record. (Default: 0)
term_delay=value Delay before terminating. (Default: 0 secs)
term_wait=time Thread termination wait time. (Default: 180 secs)
The delay options accept 'random' for random delays.
Please Note: For disk devices, microseconds is the default!:
Numeric Input:
For options accepting numeric input, the string may contain any
combination of the following characters:
Special Characters:
w = words (4 bytes) q = quadwords (8 bytes)
b = blocks (512 bytes) k = kilobytes (1024 bytes)
m = megabytes (1048576 bytes) p = page size (4096 bytes)
g = gigabytes (1073741824 bytes)
t = terabytes (1099511627776 bytes)
d = device size (set via dsize=value option)
inf or INF = infinity (18446744073709551615 bytes)
Arithmetic Characters:
+ = addition - = subtraction
* or x = multiplcation / = division
% = remainder
Bitwise Characters:
~ = complement of value >> = shift bits right
<< = shift bits left & = bitwise 'and' operation
| = bitwise 'or' operation ^ = bitwise exclusive 'or'
The default base for numeric input is decimal, but you can override
this default by specifying 0x or 0X for hexadecimal conversions, or
a leading zero '0' for octal conversions. NOTE: Evaluation is from
right to left without precedence, and parenthesis are not permitted.
Keepalive Format Control:
%b = The bytes read or written. %B = Total bytes read and written.
%c = Record count for this pass. %C = Total records for this test.
%d = The device/file name. %D = The real device name.
%e = The number of errors. %E = The error limit.
%f = The files read or written. %F = Total files read and written.
%h = The host name. %H = The full host name.
%k = The kilobytes this pass. %K = Total kilobytes for this test.
%l = Blocks read or written. %L = Total blocks read and written.
%m = The megabytes this pass. %M = Total megabytes for this test.
%p = The pass count. %P = The pass limit.
%r = Records read this pass. %R = Total records read this test.
%s = The seconds this pass. %S = The total seconds this test.
%t = The pass elapsed time. %T = The total elapsed time.
%i = The I/O mode (read/write) %u = The user (login) name.
%w = Records written this pass. %W = Total records written this test.
Latency Keywords:
%latency = The average total latency.
%latmin = The min total latency. %latmax = The max total latency.
%rlatency = The average read latency.
%rlatmin = The min read latency. %rlatmax = The max read latency.
%wlatency = The average write latency.
%wlatmin = The min write latency. %wlatmax = The max write latency.
Please see the latency_keepalive workload template for an example.
Performance Keywords:
%bps = The bytes per second. %lbps = Logical blocks per second.
%kbps = Kilobytes per second. %mbps = The megabytes per second.
%iops = The I/O's per second. %spio = The seconds per I/O.
Lowercase means per pass stats, while uppercase means total stats.
I/O Keywords:
%iodir = The I/O direction. %iotype = The I/O type.
%lba = The current logical block. %offset = The current file offset.
%elba = The error logical block. %eoffset = The error file offset.
%bufmode = The file buffer mode. %status = The thread exit status.
Job Control Keywords:
%job = The job ID. %tag = The job tag.
%tid = The thread ID. %thread = The thread number.
Misc Keywords:
%keepalivet = The keepalive time.
Default Keepalive:
keepalive="%d Stats: mode %i, blocks %l, %m Mbytes, pass %p/%P, elapsed %t"
Default Pass Keepalive: (when full pass stats are disabled via disable=pstats)
pkeepalive="%d Stats: mode %i, blocks %L, %M Mbytes, pass %p/%P, elapsed %T"
Common Format Control Keywords:
%array = The array name or management IP.
%bufmode = The file buffer mode. %dfs = The directory separator ('/')
%dsf = The device name. %device = The device path.
%sdsf = The SCSI device name. %tdsf = The trigger device name.
%file = The file name. %devnum = The device number.
%host = The host name. %user = The user name.
%job = The job ID. %tag = The job tag.
%jlog = The job log. %tlog = The Thread log.
%tid = The thread ID. %thread = The thread number.
%pid = The process ID. %prog = The program name.
%ymd = The year,month,day. %hms = The hour,day,seconds.
%date = The date string. %et = The elapsed time.
%tod = The time of day. %etod = Elapsed time of day.
%secs = Seconds since start. %seq = The sequence number.
%script = The script file name. %tmpdir = The temporary directory.
%uuid = The UUID string. %workload = The workload name.
%month = The month of the year. %day = The day of the month.
%year = The four digit year. %hour = The hour of the day.
%minutes = The minutes of hour. %seconds= The seconds of minute.
%nate = The NATE log prefix. %nos = The Nimble log prefix.
String 'gtod' = "%tod (%etod) %prog (j:%job t:%thread): "
Example: log=dt_%host_%user_%iodir_%iotype-%uuid.log
logprefix="%seq %ymd %hms %et %prog (j:%job t:%thread): "
SCSI Format Keywords:
%capacity = The disk capacity. %blocklen = The disk block length.
%vendor = The Inquiry vendor ID. %product = The Inquiry product ID.
%revision = The Inquiry revision. %devid = The device identifier.
%serial = The disk serial number. %mgmtaddr = The management address.
I/O Tune File Format Keywords:
%iotune = The I/O tune path. %tmpdir = The temporary directory.
%host = The host name. %user = The user (login) name.
Example: iotune=%iotune OR %tmpdir%host_MyIOtune_file
Pattern String Input:
\\ = Backslash \a = Alert (bell) \b = Backspace
\f = Formfeed \n = Newline \r = Carriage Return
\t = Tab \v = Vertical Tab \e or \E = Escape
\ddd = Octal Value \xdd or \Xdd = Hexadecimal Value
Prefix Format Control:
%d = The device/file name. %D = The real device name.
%h = The host name. %H = The full host name.
%p = The process ID. %P = The parent PID.
%s = The device serial number.
%u = The user name. %U = A unique UUID.
%j = The job ID. %J = The job tag.
%t = The thread number. %T = The thread ID.
Example: prefix="%U %d@%h" OR prefix="%d(%s)@%h"
Time Input:
d = days (86400 seconds), h = hours (3600 seconds)
m = minutes (60 seconds), s = seconds (the default)
Arithmetic characters are permitted, and implicit addition is
performed on strings of the form '1d5h10m30s'.
Trigger Types:
br = Execute a bus reset.
bdr = Execute a bus device reset.
lr = Execute a device lun reset.
seek = Issue a seek to the failing lba.
triage = Issue SCSI triage commands.
cmd:string = Execute command with these args:
string dname op dsize offset position lba errno noprogt
args following cmd:string get appended to above args.
Defaults:
errors=1, files=0, passes=1, records=0, bs=512, log=stderr
pattern=0x39c39c39, dispose=delete, align=0 (page aligned)
aios=8, dlimit=512, onerr=continue, volumes=0, vrecords=1
iodir=forward, iomode=test, iotype=sequential, stats=full
iotseed=0x01010101, hdsize=32, maxbad=25
--> Date: November 1st, 2025, Version: 26.0, Author: Robin T. Miller <--
%