12-07-2010 02:01 AM
How do i identify the disk device from their VxDMP id.
for e.g., "VxDMP48" is associated with which disk/LUN.
I need this information to troubleshoot below error.
"kernel: Buffer I/O error on device VxDMP48, logical block 1"
Regards,
Viralkumar Ahire
Solved! Go to Solution.
12-09-2010 12:18 AM
Hi Viral,
Not sure what exactly are you looking for so I will try to answer your original question and I hope the following helps:
Find the major and minor number of the VxDMP[*] device from /proc/partitions
Look for that major and minor number in the /dev/vx/dmp/
For instance, lets consider a device VxDMP6
12-07-2010 02:07 AM
where are you getting this message ? I mean which log file you are refering ?
Is there any other message preceeding or after this message ?
what is OS & vxvm version ?
Gaurav
12-07-2010 02:14 AM
Hi Gaurav,
I am receiving error in syslog of my linux OS.
OS & VxVM version is:
RHEL 5.4 ( 2.6.18-164.11.1.el5 ) & VRTSvxvm-5.0.40.00-MP4_RHEL5
Same error occured on many other paths as well.
Dec 7 09:46:39 lxx0311 kernel: Buffer I/O error on device VxDMP48, logical block 1
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdcf, sector 0
Dec 7 09:46:39 lxx0311 kernel: Buffer I/O error on device VxDMP48, logical block 0
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdcf, sector 24
Dec 7 09:46:39 lxx0311 kernel: Buffer I/O error on device VxDMP26, logical block 1
Dec 7 09:46:39 lxx0311 kernel: Buffer I/O error on device VxDMP42, logical block 2
Dec 7 09:46:39 lxx0311 kernel: Buffer I/O error on device VxDMP26, logical block 0
Dec 7 09:46:39 lxx0311 kernel: Buffer I/O error on device VxDMP42, logical block 0
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sddo, sector 8
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdfw, sector 0
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdej, sector 16
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdgf, sector 16
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sddx, sector 0
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdee, sector 8
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sdee, sector 24
Regards,
Viral Ahire
12-07-2010 02:54 AM
Hello,
do you have any such device like VxDMP in "vxdisk list" or /dev/vx/rdmp or /dev/vx/dmp or under /dev/ tree ?
Do you use DMP as multipathing software or is there any other multipathing software underneath ?
12-07-2010 03:07 AM
Hi Gaurav,
I dont have such device in said locations. LUNs naming convention is diffrent than this.
Yes, we are using DMP as multipathing software. And the error occuring on subpaths. like in folloing error "sddo" is mpath.
Dec 7 09:46:39 lxx0311 kernel: end_request: I/O error, dev sddo, sector 8
Regards,
Viral Ahire
12-09-2010 12:18 AM
Hi Viral,
Not sure what exactly are you looking for so I will try to answer your original question and I hope the following helps:
Find the major and minor number of the VxDMP[*] device from /proc/partitions
Look for that major and minor number in the /dev/vx/dmp/
For instance, lets consider a device VxDMP6
12-13-2010 10:35 PM
Thanks for the solution!!!!!!!!!!!