Identify Alternate Paths

[Neil Wilson_2]

How do I identify alternate disk paths for disks that are not part of a volume group?

[Steven E. Protter]

At boot, you can run the sea command, that will identify all possible boot paths.

While running the os:

ioscan -fnC disk

That will show all disks that are working. Compare that to strings /etc/lvmtab and those that appear in ioscan but not /etc/lvmtab are your suspects.

SEP

[Neil Wilson_2]

I am looking at disks that are presented from a disk array and not specifically bootable. In this instance these are EMC disks and I want to correctly identify those disks that are alternates... how?

[RAC_1]

What is this SAN?? HP, EMC?? They supply utilities to check such things. In addition tothat you may use disk (not very correct) and check sizes of the disk.

My notes also have following. (But not sure if it works on pvs, that are not part of nay vg.) you can try them.

echo "0x2008?4D" |adb /dev/dsk/c20t0d0 --disk1
echo "0x2008?4D" |adb /dev/dsk/c19t0d0 â disk2


A

[Geoff Wild · Accepted solution]

Use the EMC utility syminq

Example:

/dev/dsk/c60t5d4 is in your VG - is there and alternate path?

syminq |grep c60t5d4

Reveals:

/dev/rdsk/c60t5d4 M(4) EMC SYMMETRIX 5670 65103000 35354880

Columns are:
Name Type Vendor ID Rev Ser Num Cap (KB)

The Ser Num - is actually the EMC disk...

In my example 65103000 - 65 is the frame number and 103 is the disk number...

So:

# syminq |grep 103
/dev/rdsk/c56t5d4 M(4) EMC SYMMETRIX 5670 65103000 35354880
/dev/rdsk/c58t5d4 M(4) EMC SYMMETRIX 5670 65103000 35354880
/dev/rdsk/c60t5d4 M(4) EMC SYMMETRIX 5670 65103000 35354880
/dev/rdsk/c62t5d4 M(4) EMC SYMMETRIX 5670 65103000 35354880

There are 3 alternate paths to c60t5d4.

Rgds...Geoff

[Neil Wilson_2]

syminq seems to do the trick