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Operating System - Tru64 Unix
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Tru64 and new device file for a disk

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Adam Garsha
Valued Contributor

Tru64 and new device file for a disk

What information does Tru64 use to determine whether a new device file is required for a disk. I am wondering if you replace a disk (and Bus-Target-Lun stays the same) will the device file change?

How about if instead of a SCSI disk I have a SAN disk and I represent it with the same WWID and B-T-L as before, will it have the same device name or will a new device file be created?

I want to understand what information Tru64 uses to determine if the disk is "the same" or "new".

Thanks,

Adam Garsha
1 REPLY
Johan Brusche
Honored Contributor
Solution

Re: Tru64 and new device file for a disk


In V4.xx, disk special device names are based on device position , ie bus,target,lun .


With V5.yy, disk special device names are based on a WWID, SAN logical units presenting the same WWID to the SAN will use the same special device name.

Physical disks on a SCSI bus device naqming is based on a WWID derived from the serial number of the device. Devices with non-unique serial numbers present a problem for V5.0 that can be worked around via the ddr.dbase .

Rgds,
___ Johan./

_JB_