Re: [Bacula-users] LTO4 Tape End of Medium

Alan,

The cleaning alert came on a month or so ago. I cleaned it and it went away.

Here's what I see when I do smartctl with a tape loaded. I don't see anything that specifies the level or type of error correction:

[root@backup01 log]# smartctl -a /dev/nst0
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-431.11.2.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               IBM
Product:              ULTRIUM-TD4
Revision:             C7QH
Logical Unit id:      0x500507631207638e
Serial number:        1310230469
Device type:          tape
Transport protocol:   SAS
Local Time is:        Mon May 12 13:45:25 2014 EDT
Temperature Warning Disabled or Not Supported
TapeAlert Supported
TapeAlert: OK
Percentage used endurance indicator too short (pl=6)

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         0          0          0.000           0
write:         0        0         0         0          0          0.000           0

Non-medium error count:        0
Device does not support Self Test logging

Does this tell you anything?

Thank you,
Brian

On 05/10/2014 12:31 AM, Alan Brown wrote:

On 09/05/14 21:20, Clark, Patricia A. wrote:
It could be the drive and it could be the connection to the drive. 
It can also be a dirty drive. Cleaning tapes can only do so much.

Is the cleaning light coming up? What level of error correction is showing in the drive when you query it with smartctl and a tape loaded?

We have a persistent problem with a couple of bad HP tapes messing up the drives so badly they have to be changed out.
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