File system Error /dev/dsk/c0t1d0: I/O error

[Rizwan Choudhry]

Hi,
I recently installed HPUX on L3000 server.

# uname -a
HP-UX bhluksmp B.11.23 U 9000/800 131464607 unlimited-user license

When i do BDF i can see all file systems
# bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 1024000 329960 688752 32% /
/dev/vg00/lvol1 491952 89360 353392 20% /stand
/dev/vg00/lvol8 2633728 1803328 825168 69% /var
/dev/vg01/lvol9 6144000 39329 5723210 1% /var/opt/omni
/dev/vg00/lvol7 3440640 1742496 1684888 51% /usr
/dev/vg00/lvol4 2048000 1366032 678864 67% /tmp
/dev/vg00/lvol6 3870720 3452232 415232 89% /opt
/dev/vg00/lvol5 53248 8464 44440 16% /home

but i am getting following error when i do

# mount -a
/dev/dsk/c0t1d0: I/O error
mount: /dev/vg00/lvol8 is already mounted on /var
mount: /dev/vg01/lvol9 is already mounted on /var/opt/omni
mount: /dev/vg00/lvol7 is already mounted on /usr
mount: /dev/vg00/lvol6 is already mounted on /opt
mount: /dev/vg00/lvol5 is already mounted on /home
mount: /dev/vg00/lvol4 is already mounted on /tmp
mount: /dev/vg00/lvol1 is already mounted on /stand
#

How can i find out what is on /dev/dsk/c0t1d0
and what is wrong with it?

p.S. This thread has been moevd from Disk to HP-UX > sysadmin. - hp forum moderator

[Luk Vandenbussche · Accepted solution]

pleas post the following info

ioscan -funC disk
cat /etc/fstab
strings /etc/lvmtab

[Rizwan Choudhry]

Thank for looking into this :) Here is the info

# ioscan -funC disk
Class I H/W Path Driver S/W State H/W Type Description
==========================================================================
disk 0 0/0/1/0.1.0 sdisk CLAIMED DEVICE HP DVD-ROM 305
/dev/dsk/c0t1d0 /dev/rdsk/c0t1d0


# cat /etc/fstab
/dev/vg00/lvol3 / vxfs delaylog 0 1
/dev/vg00/lvol1 /stand hfs defaults 0 1
/dev/vg00/lvol4 /tmp vxfs delaylog 0 2
/dev/vg00/lvol5 /home vxfs delaylog 0 2
/dev/vg00/lvol6 /opt vxfs delaylog 0 2
/dev/vg00/lvol7 /usr vxfs delaylog 0 2
/dev/vg00/lvol8 /var vxfs delaylog 0 2
/dev/dsk/c0t1d0 /cdrom cdfs ro,suid 0 0
/dev/vg01/lvol9 /var/opt/omni vxfs rw,suid,nolargefiles,delaylog,datainlog 0 2


# strings /etc/lvmtab
/dev/vg00
/dev/dsk/c1t2d0
/dev/vg01
G+70
/dev/dsk/c2t2d0

[Rizwan Choudhry]

More Info

# umount /cdrom
umount: cannot find /cdrom in /etc/mnttab
cannot unmount /cdrom
# cat /etc/mnttab
/dev/vg00/lvol3 / vxfs ioerror=mwdisable,delaylog,dev=40000003 0 1 1194440914
/dev/vg00/lvol1 /stand hfs defaults,dev=40000001 0 0 1194440915
/dev/vg00/lvol8 /var vxfs ioerror=mwdisable,delaylog,dev=40000008 0 0 1194440925
/dev/vg01/lvol9 /var/opt/omni vxfs ioerror=mwdisable,nolargefiles,delaylog,dev=40010001 0 0 1194440926
/dev/vg00/lvol7 /usr vxfs ioerror=mwdisable,delaylog,dev=40000007 0 0 1194440926
/dev/vg00/lvol4 /tmp vxfs ioerror=mwdisable,delaylog,dev=40000004 0 0 1194440927
/dev/vg00/lvol6 /opt vxfs ioerror=mwdisable,delaylog,dev=40000006 0 0 1194440927
/dev/vg00/lvol5 /home vxfs ioerror=mwdisable,delaylog,dev=40000005 0 0 1194440927
-hosts /net autofs ignore,indirect,nosuid,soft,nobrowse,dev=60000000 0 0 1194441034
#

[Luk Vandenbussche]

/dev/dsk/c0t1d0 is your cdrom

with mount -a, you try to mount all the filesystems defined in /etc/fstab.

2 possiblities
a) no cdrom in the drive
b) cdrom defective

Remove /dev/dsk/c0t1d0 from /etc/fstab to avoid this problems.

Don't forget to submit points.

[Rizwan Choudhry]

OK i have remove the CDROM from fstab, i dont get the erorr any more when i run mount -a

but how to fix this problem and get the cdrom to work as normanl.
thanks

[Luk Vandenbussche]

Is the drive defective or was there no media in the cd drive?

1) If the drive is defective => ask HP to replace is
2) Put a media in the drive and mount it manually with
mount /dev/dsk/c0t1d0 /cdrom

[Andrew Rutter]

hi

mount -a isnt the normal way to mount a cdrom

if you want it mounted at start up or by this way you need to have put a cdrom in the drive first. no cdrom = no mount?

mount it manually as luk has stated.

if that fails and you cannot mount it you will get a different error like device busy, in which case likely faulty cdrom drive or bad cdrom disk

Andy

[Torsten.]

If you have the CD-ROM in fstab, you will often see messages like this.

You may consider to use the automounter or write a small script for mount/umount the drive and configure sudo to enable users of your choice to mount this drive.

[Rizwan Choudhry]

CDROM media is not corrupted.

After removing CDROM line from /etc/fstab I am unable to mount the CDROM.

# mount /cdrom
mount: /cdrom was either ignored or not found in /etc/fstab


# cat /etc/fstab
/dev/vg00/lvol3 / vxfs delaylog 0 1
/dev/vg00/lvol1 /stand hfs defaults 0 1
/dev/vg00/lvol4 /tmp vxfs delaylog 0 2
/dev/vg00/lvol5 /home vxfs delaylog 0 2
/dev/vg00/lvol6 /opt vxfs delaylog 0 2
/dev/vg00/lvol7 /usr vxfs delaylog 0 2
/dev/vg00/lvol8 /var vxfs delaylog 0 2
/dev/vg01/lvol9 /var/opt/omni vxfs rw,suid,nolargefiles,delaylog,datainlog 0 2
#

Any idea How I can fix the CDROM Again. Thanks