vgdisplay shows status stale of some mirrored extends

[Rainer von Bongartz]

My volume group vg00 is mirrored by MirrorDisk/UX
vgdisplay shows a lot of stale extends .
My questions:

1.) how can extends get stale ?? does it point to some hardware problems ??

2.) I know that vgsync can syncronize the mirror again. Can I run vgsync at any time or better reboot the box to automatically have vgsync run at activation of vg ???

[Vincent Stedema]

When you get stale PE's this means that these PE's are not in sync on both mirrors. And this can definitely point towards hardware problems. What is the status of both PV's in the vgdisplay output? If one of them is "unavailable", this means that the disk has failed.

Regards,

Vincent

[Rainer von Bongartz]

Vincent,

the PV Status is 'available' on both disks.
the stale extends occur only on one disk and the number seems to be constant (374)

The mirror disk seems to work (at least it is blinking green)

[Vincent Stedema]

Rainer,

Does the syslog report any possible hardware problems?

A vgsync or lvsync can take a long time, depending on how much data is contained in the vg/lv.

Vincent

[Rainer von Bongartz]

Vincent,

there are no indications of HW errors in syslog.

I started the support tools manager (xstm) and found some I/O errors reported for the device.
As I dont't know too much about STM I'll contact technical support now to have this cleared,

thanks
Rainer

[R Madhavan]

Yes, you can do vgsync anytime, but if your system is highly loaded, then do it at off-peak time.
You may be having H/W problem for the stale state. You may use pvdisplay -v to check which disks has got the statle extends, then use dd command to check whether you have any read problems for that disks(dd if=/dev/dsk/c?t?d? of=/dev/null bs=8192k) rgds,