On Monday 28 July 2003 18:02, Russell Adams wrote:
>> >Here's the output from tapetype.
>>
>> Here is the clue that counts, your install is old, its been named
>> amtapetype for about a year now and now has facilities to detect
>> the drives compression status.  And I'd suspect, from the results
>> you are getting that the drives own hardware compressor is on, and
>> that the data from /dev/urandom is growing quite a bit in the
>> hardware compressor.
>
>You are correct. I'm running Amanda 2.4.3.
>
>However! ;]
>
>I compiled 2.4.4p1 specifically for the _newest_ tapetype (now
> called amtapetype) because I thought my results were wrong! Ha! ;]
> That new amtapetype stopped at 27G as well.
>
>Please note there was a dramatic change in the output for
>(am)tapetype, including the weird new estimate stuff and compression
>detection. The 2.4.3 tapetype doesn't do that.
>
>Lastly, here's the output from 'mt status'.
>
>SCSI 2 tape drive:
>File number=0, block number=0, partition=0.
>Tape block size 0 bytes. Density code 0x1b (DLT 35GB).
>Soft error count since last status=0
>General status bits on (41010000):
> BOT ONLINE IM_REP_EN
>
>It's got the right density code, and I've repeatedly run 'mt
>compression off'. I still don't understand why I can't get more than
> 27G.
>
>> >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 860664 32Kb blocks in 2632 files in 24789 seconds (short
>> > write) wrote 855261 32Kb blocks in 5247 files in 33707 seconds
>> > (short write) define tapetype unknown-tapetype {
>> >    comment "just produced by tapetype prog (hardware compression
>> >off)
>> >    length 27065 mbytes
>> >    filemark 66 kbytes
>> >    speed 961 kps
>> >}
>
>Russell

That is indeed odd, and I'm afraid I'll have to defer to those who 
have that drive.  It certainly doesn't look right, thats for sure.

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
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Copyright 2003 by Maurice Eugene Heskett, all rights reserved.