From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 20072] tapeinfo reports MaxBlock: 16777215 but writes with
blocksize >2M fail
Date: Wed, 13 Oct 2010 09:50:28 GMT
Message-ID: <201010130950.o9D9oSY0018761@demeter1.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=20072
--- Comment #2 from lkolbe@techfak.uni-bielefeld.de 2010-10-11 11:25:15 ---
This is what dmesg has to say about the earlier tries to write to the device
with higher than 2MiB blocksizes:
[92315.076956] st0: Block limits 1 - 16777215 bytes.
[92445.438048] st0: Can't allocate 15728640 byte tape buffer.
[92457.973733] st0: Can't allocate 16777215 byte tape buffer.
[92460.990589] st0: Can't allocate 16777214 byte tape buffer.
--- Comment #3 from lkolbe@techfak.uni-bielefeld.de 2010-10-13 09:50:22 ---
When instructing bacula to use the advertised tape blocksize of 16M, we get the
following errors everytime it tries to access the tape:
13-Oct 11:48 sd1.techfak JobId 2692: Error: block.c:1002 Read error on fd=5 at
file:blk 0:0 on device "drv2" (/dev/nst0). ERR=Cannot allocate memory.
Is there some limit/sysctl we might have to adapt to the native tape drive
blocksize of 16M?
regards,
Lukas
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