Hi,
I wanted to check out the following issue that was brought up in one of the responses to my poll (still waiting for more replies):
When a TLU (tape Library Unit) is directly attached to a fileserver, does every reboot of the TLU necesarily mean you must reboot the fileserver?
OR
Is this only specific to the TLU vendor ( as suggested below).
I see this as a serious issue!! I don't want the uptime of my fileserver to be affected by something like this.
Manny Kaiser Email : mannyk@msil.sps.mot.com Unix System Administrator Phone : 972-9-9522-603 Motorola Semiconductor Israel LTD. Fax : 972-9-9562-990
1 Shenkar St. Industrial Zone Herzelia Herzelia 46120 Israel =============================================================================
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From alexei@cancerman.cimedia.com Thu Apr 23 07:31:50 1998 Received: from cancerman.cimedia.com (nat-a-29.cimedia.com) by spsgate.sps.mot.com (4.1/SMI-4.1/Email 2.1 10/25/93)
id AA22939 for mannyk@msil.sps.mot.com; Wed, 22 Apr 98 21:26:58 MST To: Menachem Kaiser (Manny) mannyk@msil.sps.mot.com Subject: Re: backup and Restore questions Date: Thu, 23 Apr 1998 00:27:08 -0400 From: Alexei Rodriguez alexei@cimedia.com
+--- In a previous state of mind, Menachem (Manny) Kaiser <mannyk@msil.sps.mo t.com> wrote: | | First many thanks for participating in this poll.
No problem. My pleasure.
| Why do you backup using only one stream of data.
Actually, that may not be accurate. I think we break all the file systems into chunks and work on single chunks at a time. The main reason that we run a single stream (I need to verify) is that with one drive we did not gain too much. That may be incorrect.
| Is this just a problem with your backup software?
Don't know. I'll have to ask the backup person. Might be related to our installation.
| You mentioned a very interesting note - attaching a jukebox | to the fileserver might mean that you will need to reboot the file | server from time to time. WHY? | When you reboot the tape library juke box - does this force | you to reboot the file server as well?
If the stacker/jukebox hangs for whatever reason (robotic arm, etc), and you need to power-cycle the tape device, you cannot do so with the filer on. You run the risk of frying the scsi bus.
Now, it could be that the problems I had were related to the specific DLT stacker (an ADIC vls library) we used. I don't know. I have not risked that sort of problem any more.
Alexei
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