Re: [Networker] 80 GB on AIT-4 tapes?
2005-11-18 19:05:22
I am not using AIT tape drives, but two things come to mind.
1. Has the number of files increased or decreased. You typically get
more data with large files than small, especially if they can be
compressed more.
2. Was the hardware configuration of the tape drive itself changed. Was
hardware compression turned off or on. In this case I do not mean
software.
James Rohrich
UOP LLC
25 E. Algonquin Rd.
Des Plaines, Illinois 60016
Tel: (847) 391-3958
james.rohrich AT uop DOT com
-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On Behalf Of Matt Temple
Sent: Friday, November 18, 2005 5:44 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] 80 GB on AIT-4 tapes?
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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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