topic Re: ioscan question in Operating System - HP-UX

ioscan question

BrianDoyle — Mon, 21 May 2007 05:02:59 GMT

Hi,

There are 2 local mirrored disks on this server. Does this ioscan look right?

i.e Does disk 73.4GST373454LC have 3 paths and 73.4GST373453LC just one ?

It should be split with 2 paths to each disk.

disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
disk 2 0/1/1/0.1.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c2t1d0 /dev/rdsk/c2t1d0
disk 3 0/4/1/0/4/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c4t0d0 /dev/rdsk/c4t0d0
disk 4 0/4/1/0/4/0.2.0 sdisk CLAIMED DEVICE HP 73.4GST373453LC
/dev/dsk/c4t2d0 /dev/rdsk/c4t2d0

This is setboot:
# setboot
Primary bootpath : 0/1/1/0.0.0
Alternate bootpath : 0/4/1/0/4/0.0.0

comments/advice pls,
Brian

Re: ioscan question

Sandy Chen — Mon, 21 May 2007 05:12:43 GMT

Hi,

ioscan does not show you any mirror configuration. From the ioscan you have 4 different disk,

disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0

and

disk 3 0/4/1/0/4/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373454LC
/dev/dsk/c4t0d0 /dev/rdsk/c4t0d0

are mirrored each other

regards,
Sandy

Re: ioscan question

freddy_21 — Mon, 21 May 2007 05:23:12 GMT

Hi Brian,

If you want to chack your mirror, please check
# strings /etc/lvmtab ( make sure vg00 have 2 disks)
# vgdisplay -v vg00 ( check occupy for each disk. have same free PE, and check each lvol used 2 disk and the status is sync)
# lvdisplay -v /dev/vg00/lvol1 ( make sure your lvol layout used 2 disk or not)

I agree with sandy, ioscan can't show your mirror configuration.

thanks
freddy

Re: ioscan question

Asif Sharif — Mon, 21 May 2007 05:24:30 GMT

Hi Brain,

ioscan doesn't show mirror disk information. For that you need to check from strings "/etc/lvmtab".

Regards,
Asif Sharif

Re: ioscan question

BrianDoyle — Mon, 21 May 2007 05:28:27 GMT

Hi Sandy,
Your right, i do have 4 disks and it makes sense to me now. All is well.
Thought there was a problem at first glance.

Many thanks,
Brian