Can I re-assign the scsi letter for virtual floppy?

Question

Having issues with oracle starting up in our cluster environment due to disks not lining up properly. For example, on the problematic host, I see the following.

[1:0:0:0]    cd/dvd  AMI      Virtual CDROM    1.00  /dev/sr0
[2:0:0:0]    disk    AMI      Virtual Floppy   1.00  /dev/sdc

My LUN from the SAN starts at /dev/sdd. On the server that works, I have the following:

[3:0:0:0]    disk    AMI      Virtual Floppy   1.00  /dev/sdt

So its LUN starts at /dev/sdc. How can I force the "Virtual Floppy" to give up /dev/sdc so my LUN can take it over?!

beats the heck out of me. im thinking it has to do w/ the iLOM device. There isn't a floppy device on this server, just a DVD rom and 4 disks. — sdot257, Dec 14 '11 at 00:11
Do you need the virtual floppy? You can always remove it if not required. — Chopper3, Dec 14 '11 at 00:11

score 1 · Answer 1 · answered Feb 14 '12 at 16:37

You can't, the SCSI Device block device presentation isn't deterministic and never will be.

You must derive a unique identifier for that device and then create a UDEV rule that will create a persistent symlink which will always point to your virtual floppy, no matter what the scan order is.

See http://reactivated.net/writing_udev_rules.html

Trivial Example: http://www.cyberciti.biz/tips/linux-assign-static-names-to-scsi-devices.html

Can I re-assign the scsi letter for virtual floppy?

1 Answers1