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тАО09-08-2003 07:36 AM
тАО09-08-2003 07:36 AM
I have two DLT8000's where one is daisy chained to another. We want to disconnect them. I have replaced drives while the system has been up before but can I permanently disconnect them while the system is up?
Spike
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тАО09-08-2003 10:04 AM
тАО09-08-2003 10:04 AM
Re: SCSI Tape drive being disconnected
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тАО09-08-2003 10:18 AM
тАО09-08-2003 10:18 AM
Re: SCSI Tape drive being disconnected
As an update, the machine is HP9000, L1000 running HP-UX 11.0
Spike
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тАО09-08-2003 11:02 AM
тАО09-08-2003 11:02 AM
Re: SCSI Tape drive being disconnected
- if there're another devices on the same SCSI bus their operation may be interrupted (for example, another tape drive's backup may and will fail) because of SCSI resets and bus being unterminated during disconnection;
- ioscan will report these tape devices as 'NO_HW' until you'll reboot server to force server to 'forget about them';
- you may need to remove tapes' device files if you will not be connecting drives to this bus with the same SCSI Ids in the future any more. Just not to mix these 'old' device files with another ('new') ones
Eugeny
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тАО09-09-2003 05:15 AM
тАО09-09-2003 05:15 AM
SolutionDepending on what kind of SCSI card you're using, I'd suggest that you connect a terminator at the point where the drives were removed, just to ensure that it doesn't screw up any other devices (if any) on that bus. I'd also remove the device files from /dev, just to ensure that there's no confusion. If you see these recreated, someone's tried to write to them. Alternatively, mark them read only and see who or what starts complaining that they're no longer accessible to avoid filling up the root filesystem.