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Dave,
~ I wish it was something obvious like that, believe me.
These are
new tapes; I've cleaned the drives regularly. I had even wondered if the
Qualstar unit itself was interfering, but the 3rd drive is on a chain
by itself
in the library. The drives hav e the newest firmware, which I upgraded
in hopes of improvement. Now that I changed the SCSI controller
and the SCSI cables, I believe THAT's out of the loop. (The Adaptec
cards seem to have a lot of detractors -- I'd never had any problem
with them
specifically though -- I'll see how these LSI-logic cards do -- they
configured
automatically, though and work.)
~ I've had many ongoing nightmares with Networker/Linux that
fall somewhere
between bugs and attributes. I could switch over to 7.2 from
7.1.3-1, but that seems
a bogus way to go at this point.
~ Matt
Temple
Matt Temple wrote:
| The native compression of AIT-4 is 200 gb, so this is really weird.
| I'd be staisfied with 190 GB. We were getting that at the start.
|
|
| ~ mht
|
| Werth, Dave wrote:
|
| | Matt, | | We installed AIT-4 tapes about 2 months ago and in
| looking at the | tapes that are full it looks like we're averaging
| around 190 GB per | tape (it varies from 136 GB to 208 GB) with
| software compression. | What you're seeing is about half of that so
| is it possible you | don't have compression turned on? I think the
| native capacity of | AIT-4 is 100 GB so that would make sense. | |
| Dave | | David Werth Garmin AT, Inc Salem, Oregon
| dave.werth AT garmin DOT com | | -----Original Message----- From: Matt
| Temple | [mailto:mht AT RESEARCH.DFCI.HARVARD DOT EDU] Sent: Friday,
| November 18, | 2005 3:44 PM To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
| Subject: [Networker] | 80 GB on AIT-4 tapes? | | | |
| ------------------------- This e-mail and any attachments may |
| contain confidential material for the sole use of the intended |
| recipient. If you are not the intended recipient, please be aware
| | that any disclosure, copying, distribution or use of this e-mail
| or | any attachment is prohibited. If you have received this
| e-mail in | error, please contact the sender and delete all copies.
| Thank you | for your cooperation | |
|
| | 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 | | |
|
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|
| ~ ------------------------- This e-mail and any
| attachments may contain confidential material for the sole use of
| the intended recipient. If you are not the intended recipient,
| please be aware that any disclosure, copying, distribution or use
| of this e-mail or any attachment is prohibited. If you have
| received this e-mail in error, please contact the sender and delete
| all copies. Thank you for your cooperation
|
| To sign off this list, send email to listserv AT listserv.temple DOT edu
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|
|
|
| -- =============================================================
| 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!
To sign off this list, send email to listserv AT listserv.temple DOT edu
and type "signoff networker" in the
body of the email. Please write to
networker-request AT listserv.temple DOT edu if you have any problems
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- --
=============================================================
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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