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unable to lable and initialize the EMC symmetrix disks

Kumar_Jasti
Level 3

Hi Friends,
please help how to resolve this issue. i am not able to lable the disk , not able to display partition table also and even i am not able to initialize or uninitilize the disk. these are newly added disks and operating system is solaris 10 and  veritas version is VERSION:  5.0,REV=05.11.2006.17.55. so please help me here...........

sunhost0042 # vxdisk -o alldgs list|egrep -i "c5t6d62s2|c5t6d63s2|c5t6d64s2|c5t6d65s2|c5t6d66s2|c5t6d67s2|c5t6d68s2|c5t6d85s2|c5t6d87s2|c6t6d60s2|c6t6d61s2|c6t6d68s2|c6t6d69s2|c6t6d70s2|c6t6d88s2"
c5t6d62s2    auto            -            -            error
c5t6d63s2    auto            -            -            error
c5t6d64s2    auto            -            -            error
c5t6d65s2    auto            -            -            error
c5t6d66s2    auto            -            -            error
c5t6d67s2    auto            -            -            error
c5t6d68s2    auto            -            -            error
c5t6d85s2    auto            -            -            error
c5t6d87s2    auto            -            -            error
c6t6d60s2    auto            -            -            error
c6t6d61s2    auto            -            -            error
c6t6d68s2    auto            -            -            error
c6t6d69s2    auto            -            -            error
c6t6d70s2    auto            -            -            error
c6t6d88s2    auto            -            -            error

sunhost0042 # prtvtoc /dev/rdsk/c6t6d62s2
prtvtoc: /dev/rdsk/c5t6d62s2: Unable to read Disk geometry errno = 0x5

sunhost0042 # format c6t6d62s2

FORMAT MENU:
        disk       - select a disk
        type       - select (define) a disk type
        partition  - select (define) a partition table
        current    - describe the current disk
        format     - format and analyze the disk
        repair     - repair a defective sector
        label      - write label to the disk
        analyze    - surface analysis
        defect     - defect list management
        backup     - search for backup labels
        verify     - read and display labels
        save       - save new disk/partition definitions
        inquiry    - show vendor, product and revision
        volname    - set 8-character volume name
        !<cmd>     - execute <cmd>, then return
        quit
format> l
Current Disk Type is not set.
format> type

sunhost0042 # /etc/vx/bin/vxdiskunsetup -C c5t6d62
prtvtoc: /dev/rdsk/c5t6d62s2: Unable to read Disk geometry errno = 0x5
sunhost0042 # /etc/vx/bin/vxdisksetup -i c5t6d62
prtvtoc: /dev/vx/rdmp/c5t6d62s2: Unable to read Disk geometry errno = 0x5

sunhost0042 # vxdisk list c5t6d62s2
Device:    c5t6d62s2
devicetag: c5t6d62
type:      auto
flags:     online error private autoconfig
pubpaths:  block=/dev/vx/dmp/c5t6d62s2 char=/dev/vx/rdmp/c5t6d62s2
guid:      -
udid:      EMC%5FSYMMETRIX%5F704943%5F4387F000
site:      -
Multipathing information:
numpaths:   2
c5t6d62s2       state=enabled
c6t6d62s2       state=enabled

 

1 ACCEPTED SOLUTION

Accepted Solutions

Kumar_Jasti
Level 3
Hi Marianne,
Thanks for the reply, as per the technote one of the path is missing. but here in my case i am able to see both the paths. i have problem with my symmetrix devices and not for the clarrion devices. i asked EMC to look into the issue and they r ectified the issue with in minnutes. they said it is issue from Array side. If one have idea what they changed in storage side please let me know.

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8 REPLIES 8

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified
Have you verified Array Settings as per page 10 of Hardware TechNote?

This TechNote describes a similar problem with EMC Clariion:
http://seer.entsupport.symantec.com/docs/305501.htm

Kumar_Jasti
Level 3
Hi Marianne,
Thanks for the reply, as per the technote one of the path is missing. but here in my case i am able to see both the paths. i have problem with my symmetrix devices and not for the clarrion devices. i asked EMC to look into the issue and they r ectified the issue with in minnutes. they said it is issue from Array side. If one have idea what they changed in storage side please let me know.

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified
Hi Kumar,
I was trying to point out that Array settings can cause these kind of errors. The TechNote describes a situation where both paths can be seen, but 'format' command output displays <drive type unknown> for one of the paths to the LUN,

Page 10 of the Hardware TechNote contains settings for Symmetrix. Please ask the EMC support team to check and confirm.

jayess
Level 3
 Hi Kumar, 

One typical scenario is,  When the storage admin presents the LUN to a host, all those LUNs need to be made r/w enabled.  Result of not doing so will fail any disk initialization commands or even prtvtoc/format commands. 

Other interesting fact i observed with SVC is, if the LUNs are presented uncooked or half cooked ( SVC puts those LUNs into read only mode while cooking) also shows the same behavior as above. 

Other possible scenario could be, same LUN accidentally zoned to more than one systems.

varma
Level 2

Kumar, do a "vxdctl enable" twice, Then try to label the Disks.
Still if you have any issues, please post the error here.
I have faced the similar issue before and I resolved it.

ehadi
Level 2
Employee Accredited Certified

Hi Kumar,
Looking at the partition table of the device, looks like the device has not been labelled yet.

Please label them through 'format'' first.

Once they have been labelled, please run the 'prtvtoc' again and make sure you can see the partition table.

Only then, you can go and initialise the devices within volume manager using ' vxdisksetup' command.

Hope this helps.

mkeys
Level 2
I had a similar problem.  Tresspass the Clariion LUN(s) to the other SP.  That should fix the issue with prtvtoc.  Then rescan the LUN(s) (vxdctl enable) and you should be able to initialize them.

mkeys
Level 2
Oops.  Sorry.  Had Clariion on the brain.  Check your SAN zones, then your Symmetrix masking.  Make sure each LUN is masked as the same Host LUN ID on all of the host HBA's.