ADVFS IO Error

[bhos]

Version - OSF1 V4.0 1229 alpha

I get the following error in /var/adm/messages.

Tag:
0x000001c1.8002
Page: 0
Block: 629120
Block count: 16
Type of operation: Read
Error: 5
To obtain the name of the file on whi
the error occurred, type the comman
/sbin/advfs/tag2name /usr/.tags/449
AdvFS I/O error:
Domain#Fileset: usr_domain#usr
Mounted on: /usr
Volume: /dev/rz11g
Tag: 0x00000459.8001
Page: 0
Block: 462128
Block count: 16
Type of operation: Read
Error: 5
To obtain the name of the file on whi
the error occurred, type the comman
/sbin/advfs/tag2name /usr/.tags/1113
AdvFS I/O error:
Domain#Fileset: usr_domain#usr
Mounted on: /usr
Volume: /dev/rz11g
Tag: 0x00000fa9.8001
Page: 0
Block: 626928
Block count: 16
Type of operation: Read
Error: 5
To obtain the name of the file on whi
the error occurred, type the comman
/sbin/advfs/tag2name /usr/.tags/4009
# /sbin/advfs/tag2name /usr/.tags/4009
/usr/bin/X11
# /sbin/advfs/tag2name /usr/.tags/1113
/usr/share
# /sbin/advfs/tag2name /usr/.tags/449
/usr/bin/csh.

There are many tags i get other than this also.

Is there a way to rectify this error. If recreation of domain is the only option left out. Can somebody please tell me about how to do it cautiously by getting the same data back.

[Ivan Ferreira]

I/O errors normally are produced by a defective block on media. You should start by thinking in replace your disk.

SCSI disks can detect bad blocks and automatically mark them so they won't be used anymore.

You can run the /sbin/advfs/verify command to verify the domain consistence.

If you want to replace the disk, you have to use vdump to save the data and then vrestore.

See the section "Recovering Data from a Corrupted root Domain" in the Tru64 Unix AdvFS Administration.