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Re: [Networker] Bar Code reader on drive?
2009-12-08 12:27:15
Conrad Macina wrote:
A STK library with four drives requires five connections to the server, one
for each drive and one for the robot. A Quantum library, on the other hand,
Thanks, Conrad. I hadn't considered this, and that makes sense, but our
STK has the picker daisy-chained to drive 1. Each of the other drives
(drives 2-8) has its own separate connection via dual-channel HBAs, so
two drives will share the same HBA, but each on its own channel. There's
a separate SCSI cable connecting each drive to the respective channel.
only would require four connections because the robot connects through one
of the drives. That's why loaderinfo shows "No" for all the drives in an STK
library and "Yes" for one drive in a Quantum -- that's the drive through
which the robot connects.
Drives 1-2 on the Quantum (M1800; two M1500s stack linked) are daisy
chained, and it appears that the library itself is also connected to
this and then connects via SCSI cable to channel 1 on a single
dual-channel HBA. Drives 3-4 are likewise daisy-chained to each other
and then connect via SCSI cable to the second channel on that same card.
I would think, therefore, that the first drive (/dev/sg5; /dev/nst0)
would be the one that would be set to 'Yes', and drives 3-4
(/dev/sg6-sg8; /dev/nst1-3) would be set to 'No'. Instead, it's the
other way around?
George
HTH,
Conrad Macina
Pfizer, Inc.
On Mon, 7 Dec 2009 17:17:10 -0500, George Sinclair
<George.Sinclair AT NOAA DOT GOV> wrote:
Hi,
We have an old Quantum tape library with four SDLT600 drives. This is
running on a RH Linux snode. I notice that when I run the loaderinfo
command as:
/usr/sbin/loaderinfo -f /dev/sg#
it reports "Bar Code Reader: No" for drive 1 of 4, but "Yes" when I run
the command against the other three drives. Otherwise, the values
reported from the command are all the same between the drives, and all
drives have the same firmware.
I'm not sure what this value really implies, anyway, given that the
picker is the hardware that would have a bar code reader and not the
drive, correct? When I run loaderinfo against the picker device, it
reports 'Yes' for this value.
Drive 1 of 4 functions fine, with or without bar codes tapes, so the
fact that this setting is 'No' doesn't seem to be causing it any problems.
But anyone know why this would report 'No' and how to set it to 'Yes'?
Maybe it should be 'No' and the others should also be 'No'?
I notice on our STK LTO-3 tape library, however, that all the drives
report 'No', including the medium changer, too! But, again, everything
functions just fine on there.
Thanks.
George
--
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George Sinclair
Voice: (301) 713-3284 x210
- The preceding message is personal and does not reflect any official or
unofficial position of the United States Department of Commerce -
- Any opinions expressed in this message are NOT those of the US Govt. -
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 with this list. You can access the
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via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
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