# amtapetype -o -f /dev/nsa0
Writing 128 Mbyte   compresseable data:  28 sec
Writing 128 Mbyte uncompresseable data:  28 sec
Estimated time to write 2 * 1024 Mbyte: 448 sec = 0 h 7 min
wrote 1072233 32Kb blocks in 3279 files in 14618 seconds (short write)
wrote 1070421 32Kb blocks in 6567 files in 24422 seconds (short write)

define tapetype unknown-tapetype {
    comment "just produced by tapetype prog (hardware compression off)"
    length 33560 mbytes
    filemark 17 kbytes
    speed 1874 kps
}

~BAS

On Thu, 28 Jul 2005, Brian A. Seklecki wrote:

(sorry if this is a duplicate, i sent it while my subscription was in limbo w/ majordomo)

---

All:

New material for the FAQ-o-matic. There are Dell 120 series unit listed, but none feature a 120T.

I'm not sure about these filemark values. Obviously a value of 0 won't work, will it?

~BAS

------------

$ uname -msr
FreeBSD soundwave 5.3-RELEASE-p15 i386

ch1 at ahc0 bus 0 target 0 lun 0
ch1: <ADIC FastStor DLT D116> Removable Changer SCSI-2 device
ch1: 3.300MB/s transfers
ch1: 7 slots, 1 drive, 1 picker, 0 portals

sa0 at ahc0 bus 0 target 1 lun 0
sa0: <QUANTUM DLT7000 2561> Removable Sequential Access SCSI-2 device
sa0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit)



-------------



# chio -f /dev/ch1 status
picker 0:
slot 0: <ACCESS,FULL>
slot 1: <ACCESS>
slot 2: <ACCESS,FULL>
slot 3: <ACCESS>
slot 4: <ACCESS>
slot 5: <ACCESS,EXCEPT>
slot 6: <ACCESS,EXCEPT>
drive 0: <ACCESS,FULL>

# chio -f /dev/ch1 params
/dev/ch1: 7 slots, 1 drive, 1 picker
/dev/ch1: current picker: 0


# amtapetype -f /dev/sa0
Writing 256 Mbyte   compresseable data:  25 sec
Writing 256 Mbyte uncompresseable data:  207 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 1024 Mbyte: 1656 sec = 0 h 27 min
wrote 454530 32Kb blocks in 1390 files in 13494 seconds (short write)
[interrupt]

# mt -f /dev/sa0 comp off
# amtapetype -of /dev/sa0
Writing 32 Mbyte   compresseable data:  25 sec
Writing 32 Mbyte uncompresseable data:  26 sec
Estimated time to write 2 * 1024 Mbyte: 1664 sec = 0 h 27 min
wrote 454530 32Kb blocks in 1390 files in 13494 seconds (short write)
wrote 455585 32Kb blocks in 2795 files in 16343 seconds (short write)
define tapetype unknown-tapetype {
   comment "just produced by tapetype prog (hardware compression off)"
   length 14220 mbytes
   filemark 0 kbytes
   speed 984 kps
}

# ---- WITH COMPRESSION -----

# mt -f /dev/sa0 comp on
# mt -f /dev/sa0 status
Mode      Density              Blocksize      bpi      Compression
Current:  0x19:DLTapeIII       variable       62500    IDRC
---------available modes---------
0:        0x19:DLTapeIII       variable       62500    IDRC
1:        0x19:DLTapeIII       variable       62500    IDRC
2:        0x19:DLTapeIII       variable       62500    IDRC
3:        0x19:DLTapeIII       variable       62500    IDRC
---------------------------------
Current Driver State: at rest.
---------------------------------
File Number: 0  Record Number: 0        Residual Count 0

# time amtapetype -of /dev/sa0
Writing 256 Mbyte   compresseable data:  25 sec
Writing 256 Mbyte uncompresseable data:  206 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 1024 Mbyte: 1648 sec = 0 h 27 min
wrote 409404 32Kb blocks in 1252 files in 13262 seconds (short write)
wrote 410923 32Kb blocks in 2521 files in 18251 seconds (short write)
define tapetype unknown-tapetype {
   comment "just produced by tapetype prog (hardware compression on)"
   length 12817 mbytes
   filemark 0 kbytes
   speed 854 kps
}

real    536m42.013s
user    0m3.708s
sys     1m8.313s

l8*
        -lava

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