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List:       smartmontools-support
Subject:    [smartmontools-support] TapeAlert has incorrect data sizes by 1000x,
From:       "Robin H. Johnson" <robbat2 () gentoo ! org>
Date:       2008-03-24 23:23:22
Message-ID: 20080324232322.GE1635 () curie-int ! orbis-terrarum ! net
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Using my LTO3 drive, I noticed some oddities.
- First of all, the counters don't seem be preserved very well over time.
  Record the deltas if you care about them!
- Secondly, and the reason for writing this email, the 'Gigabytes processed'
  field seems to be off by a factor of 1000x.

The following is right after I restored 160Gb from a tape.

buck-int lto3 # smartctl -a /dev/sg2
smartctl version 5.38 [powerpc-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: IBM      ULTRIUM-TD3      Version: 4C17
Serial number: 1210002496
Device type: tape
Local Time is: Mon Mar 24 16:20:47 2008 PDT
Temperature Warning Disabled or Not Supported
TapeAlert Supported
TapeAlert: OK

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:          0        0         0         1          1          0.160           0
write:         0        0         0         0          0          0.000           0

Non-medium error count:        0
Device does not support Self Test logging
buck-int lto3 # du --bytes
162154754127	.



-- 
Robin Hugh Johnson
Gentoo Linux Developer & Infra Guy
E-Mail     : robbat2@gentoo.org
GnuPG FP   : 11AC BA4F 4778 E3F6 E4ED  F38E B27B 944E 3488 4E85

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