mesg 048 : vx_mapbad

[viks]

hi all..i increased one of my FS in ther raid to 132 GB and checked it by mounting.but after a reboot i found the FS corrupted and even fsck cudnt help.the mesg is " vxfs: mesg 048: vx_mapbad - file system extent allocation unit state bitmap number 0 marked bad".i have 100GB data.cud somebody help to retrieve it.

[Steven Sim Kok Leong]

Hi,

Did you run fsck interactively instead of fsck -P?

It is RAID so I gather that it is unlikely for you to encounter a faulty physical extent. Have the RAID integrity double-checked.

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com

[T. M. Louah]

Hi V.,
It looks like a patch issue, HP Patch databse suggest the following patch:
For 11.x
Patch Description: s700_800 11.00 Cumulative JFS patch - panic:dirty

For 10.20
Patch Description: s800 10.20 Data page fault in vx_map_delayflush()

Patch Description: s700 10.20 Data page fault in vx_map_delayflush()

For more Information refer to HP patch web site:

https://us-support2.external.hp.com/wpsl/bin/doc.pl/screen=wpslSrchHPUXpatches/sid=c3a3e04f11a45b51e3?OS=HP-UX
Remember to have a recent bkup of ur data before appluying any patch.

G'd luck
T++

[viks]

hi T.,i downloaded a kernel patch PHKL_20728 from the said site last evening only.but still it didnt give any result.fortunately i cud mount it in readonly mode .so i am taking one more backup now.so wat i feel is there shud be someother way around to solve this without a newfs and restoration.if u cud find out pls let me know.thenn i i lvreduce will it help instead of newfs on that FS.even i am planning to try fsck on the mounted FS after the backup is over.i smell that the LV has become readonly thats why it is not able to rectify the problems even when fsck is claiming that it has fixed it.
thanks in advance
viks

[T. M. Louah]

Hi V.,
1) Start by making sure that all patches status are CONFIGURED & no INSTALLED is shown in the following command:
# swlist -l fileset -a state |more
if there's any INSTALLED patches there state should turn to CONFIGURED after an 'swconfig'.
2) make sure that the following patches exist on your system:
PHCO_23437 LVM commands cumulative patch
PHCO_23844 fsck_vxfs(1M) cumulative patch
PHKL_16751 SIG_IGN/SIGCLD,LVM,JFS,PCI/SCSI cumulative patch
PHKL_16957 Physical dump devices configuration patch
PHKL_17858 Fix for mount/access of disc sections
PHKL_20611 Correct process hangs on ufs inodes
PHKL_21595 VxFS (JFS) mount, fsck cumulative patch
PHKL_21661 lo_realvfs panic fix, Cumulative LOFS patch
PHKL_23419 VxFS mount(2) cumulative patch
PHNE_22507 cumulative ARPA Transport patch
3) There has been some known issues for FS larger than 64GB in 10.20, u might want to consider loggina call with HP.

G'd luck
T++

[viks]

hi T , thanks for the response but i mkfsed the FS as the down time cant be tolerated and moreover i find there is no other go.but one good thing is i mounted the FS in read only mode and took one more backup.i am restoring it now and i estimate it to go for 30 hrs.anyhow thanks for the response.i will ask u if something more is reqd.
viks

[T. M. Louah]

u da man! take a look at this document to be kosher :
http://docs.hp.com/hpux/onlinedocs/5971-2383/5971-2383.html
.. and remember it's a good idea to put some points.
HNY