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тАО11-13-2002 03:27 PM
тАО11-13-2002 03:27 PM
I ordinarily have to reboot the server to 'see' the drive after I attach it. This is a nuiscence, and disruptive.
Is there a better way?
Solved! Go to Solution.
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тАО11-13-2002 03:24 PM
тАО11-13-2002 03:24 PM
SolutionTed
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тАО11-13-2002 03:33 PM
тАО11-13-2002 03:33 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
I'll give it a go and let you know how we go (today or tomorrow)
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тАО11-13-2002 05:00 PM
тАО11-13-2002 05:00 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
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тАО11-14-2002 02:01 AM
тАО11-14-2002 02:01 AM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
These are not hotSwap devices
even if it work, I didn't suggest you to connect or disconnect such a kind of unit without powering down the server, the problem is electricaly related and a voltage spike at disconnect time could generate extra current in the related line and blow up scsi interface.
Reconnecting the device is very easy to let the pins of the connector get in contact with the grounding shield of the connector itself.
Knowing this you can evaluate if you could deal with the risk
bye
marino
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тАО11-14-2002 01:12 PM
тАО11-14-2002 01:12 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
AS for the ioscan question... ioscan -funC does not actually perform a fresh scan, but reports the devices available based on the last scan
simply entering ioscan will rerun everything and the insf -e is only required if the device file is not present
Ted
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тАО11-14-2002 01:34 PM
тАО11-14-2002 01:34 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
marino
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тАО11-14-2002 02:52 PM
тАО11-14-2002 02:52 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
If the particular bus in question is not actively being used by any other peripheral, then it is possible to connect your DDS-3 drive to the bus, perform the ioscan and insf commands, and do what you want to do.
However, I would strongly recommend that you use a pass-through SCSI terminator so that you do not have to disconnect and reconnect the terminator each time. This assumes, of course, that you have other external SCSI devices on that bus. If you don't, then make sure that the DDS-3 drive already has its terminator in place before connecting the external cable to the server.
Also, make sure that you have plugged in the power supply to the tape drive to the mains. This will ensure that any static electricity buildup in the DDS drive cabinet is dissipated through the ground rather than through the SCSI cable. Of course, the DDS drive should be OFF when you do this.
Even taking all these precautions, it is possible to damage the SCSI controller on your server. After 5 to 7 years of doing this sort of thing on a regular (daily/hourly) basis with half a dozen workstations, I managed to break one (1) HP low speed SCSI controller. I then went and bought an HP PCI LVD/SE SCSI controller and continued on my merry way. :-)
When you guys get more $$$, then you can buy some new or used DDS-3 drives and not play these games.
Optionally, access the DDS drive remotely over your LAN.
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тАО11-14-2002 03:09 PM
тАО11-14-2002 03:09 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
I am inclined to 'give-it-a-go' - being mindful of the spikes, and the odds as outlined above. The passthrough scsi terminator sound like a good idea. My preferred option is more dives, but.......
Accessing the dds-3 through the network? Now thats a whole new ball game! Our primary use is making system recovery tapes - I suspect access via the LAN is a no-can-do. But- for one-off backups; archiving; temporary offline storage.....sounds great! I might start another thread on that (accessing a dds-3 tape dive via the LAN? how to do it?)
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тАО11-14-2002 06:22 PM
тАО11-14-2002 06:22 PM
Re: Can I attach a scsi dds-3 tape drive to a HP l-1000 without rebooting?
* powered down the dds-3
* left it connected to the power (earthing it)
* noted no other activity on the scsi
* carefully unplugged the scsi cable from the back of the server
* carefully plugged it into the scsi port of the next server
* powered the unit up
did an ioscan
* did a ioscan -C tape -fun - just to make sure I could see the device.
* then happily did a mediainit -v /dev/rmt/0mb
and right now am using ignite to build a system recovery tape.
Seemed to work (on this occassion)
Again - thanks to all!