what sort of files are you backing up?
I use SDLT's and we see gzip files actually get a little larger when using
hardware compression whilst some other files compress much more than 2x.
maybe you could try a test run using the bigasm directive.
-----Original Message-----
From: Legato NetWorker discussion
[mailto:NETWORKER AT listserv.temple DOT edu]On Behalf Of Matt Temple
Sent: Saturday, 19 November 2005 10:44 AM
To: NETWORKER AT listserv.temple DOT edu
Subject: [Networker] 80 GB on AIT-4 tapes?
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
All,
~ Anyone have any idea why we might be getting about 80 gb on our
AIT-4 tapes. Consistently 80, 85, 87, etc.
~ On the thought it might be a particular scsi card and
driver, I replaced
our adaptec card with an LSI-logic one. No difference.
~ Does anyone have any settings for stinit.def for AIT-4, or
do you use the same
as AIT-3? Block sizes?
~ (By the way -- this is a storage node, we've run it both
with RH9 and Fedora Core
1 with no differences in behavior.). To make matters stranger, we
were getting higher
density when we first got the drives this May.)
~ Kernel is 2.4.21.2199.5ntlsmp; 4 gb RAM; we're using a tape
blocksize of 192K
as we do with the AIT-3 drives.
~ By the way -- Networker 7.1.3. Our machine and drives:
| Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: QUALSTAR Model:
| TLS-46120 Rev: 224b Type: Medium Changer
| ANSI SCSI revision: 02 Host: scsi2 Channel: 00 Id: 01 Lun: 00
| Vendor: SONY Model: SDX-900V Rev: 0102 Type:
| Sequential-Access ANSI SCSI revision: 03 Host: scsi2
| Channel: 00 Id: 02 Lun: 00 Vendor: SONY Model: SDX-900V
| Rev: 0102 Type: Sequential-Access ANSI SCSI
| revision: 03 Host: scsi3 Channel: 00 Id: 03 Lun: 00 Vendor: SONY
| Model: SDX-900V Rev: 0102 Type: Sequential-Access
| ANSI SCSI revision: 03
- --
=============================================================
Matthew Temple Tel: 617/632-2597
Director, Research Computing Fax: 617/582-7820
Dana-Farber Cancer Institute mht AT research.dfci.harvard DOT edu
44 Binney Street, LG300/300 http://research.dfci.harvard.edu
Boston, MA 02115 Choice is the Choice!
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