SouthEast-Smith
Contributor
Contributor

Johnny

Luke

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8 Replies
waynegrow
Expert
Expert

Is it possible the array is still formatting the LUN? I sometimes see this when that is happening.

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SouthEast-Smith
Contributor
Contributor

I don't think so. The SAN admin made the luns available last week. He is on vacation now

Any ESX commands to refresh or reformat the lun? thx

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boydd
Champion
Champion

#esxcfg-mpath -l | more (list vmhba's)

#esxcfg-rescan vmhba# (number is hba - 3, 4, 5 etc....).

DB

DB
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jjohnston1127
Hot Shot
Hot Shot

With the VI Client, click on one of your ESX Hosts.

Go to Configuration

Click on Storage Adapters

Click on each of your storage adapters and then click the blue "Rescan..." link above it to the right.

Check both boxes if not already checked and hit OK.

Then go back to add storage, it will be there.

*NOTE* You do not have to add storage to your other ESX hosts. Simply rescan on all HBAs and then do a refresh on the storage.

Hope this helps.

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SouthEast-Smith
Contributor
Contributor

Thanks for everyones replies

I've already rescanned from with VC

and I'm having problems with the esxcfg-rescan command

the lun is /dev/sdb

hba0:0:1

please help with the verbiage of the command. Thanks!

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dbis
Enthusiast
Enthusiast

If the LUN was made up out of disks that used to contain a file system and it is not zeroed out, ESX could read this and potentially cause problems.

Use fdisk to see if there are any partions on the drive, if there are delete them and try to add storage again.

"fdisk /dev/sdb" to start fdisk

"p" to print partition table on the disk

"d" to delete partition

"w" to write changes to disk

Let us know if it already sees a partition on the disk.

Daniel

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murreyaw
Enthusiast
Enthusiast

If the lun shows up under the HBA, but not for add storage, it may already be formatted with some other fs type. Run fdisk to verify.

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SouthEast-Smith
Contributor
Contributor

Sorry for not giving points. I found this thread under my account.

Wow, I can't believe I posted this. It is amazing how much can be learned within a year:)

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