/dev/dsk missing.

[Fred Myers_1]

I have a system on a Direct connect EMC, moving to a SAN's EMC. After some maintenance my /etc/lvmtab vgscan and /dev/dsk is Incorrect.

I have done a mv /etc/lvmtab /etc/lvmtab.OLD
vgscan -av and this did not recreate the /etc/lvmtab file.

I also notice that nothing is listed in /dev/dsk but /dev/rdsk is ok. I tried to ioscan and infs -e and that did not fix the problem either.

During a vgdisplay -v I get 0 Physical Volumes on all of my volume groups.

Please any help would be appreciated.

Thanks In advance.

[Pete Randall]

Fred,

What does ioscan show?

ioscan -fnCdisk



Pete

[Fred Myers_1]

Controlers

3 - root SC10
49 - NEW SANS EMC
41 - Old EMC (direct connect)
6 - root mirror SC10
51 - NEW SANS EMC
43 - Old EMC (direct connect)

Powermt display
Symmetrix logical device count=85
==============================================================================
----- Host Bus Adapters --------- ------ I/O Paths ----- ------ Stats ------
### HW Path Summary Total Dead IO/Sec Q-IOs Errors
==============================================================================
17 UNKNOWN failed 41 41 - 0 0
33 UNKNOWN failed 41 41 - 0 0
41 0/10/0/0.1.30.0.0 optimal 41 0 - 0 0
43 1/8/0/0.1.31.0.0 optimal 41 0 - 0 0
49 0/8/0/0.99.30.19.0 optimal 38 0 - 1 0
51 1/2/0/0.99.34.19.0 optimal 37 0 - 6 0

[Rammig Claus]

Hi Fred,

have you tried:

powermt remove hba=17
powermt remove hba=33
powermt check
powermt config

Best regards ...
Claus

[Sridhar Bhaskarla]

Hi,

Your powermt is deceiving. Looks like you are not using HBAs 17 and 33 so you don't need to worry about them. Other 4 HBAs do seem to be fine as there are no Dead disks. Probably you are just missing the device files.

Create them using "insf -e" and see if it is successful. If so, them move your /etc/lvmtab back and try activating them.

-Sri

[Sridhar Bhaskarla]

I would need to correct myself. You don't have HBAs 17 and 33. Did you move them to new positions during the maintenance?. If so, your device files would change and your lvmtab won't work anymore.

Whenever you are dealing with disk related activities, it is advisable to generate map files with different options and save them on network somewhere.

Please let us know if it was the case.

-Sri