Ask the Expert

Making a LUN accessible from two servers

I have connected the same SCSI disk across two hosts, giving both hosts as exclusive logins. My SCSI disk is detected and visible from both initiators. Now, when I write a file from initiator 1 to the disk, and force a bus reset, initiator 2 can't see the file. Is there any way to force the initiator to reread the disk from the initiator instead of reading from the cache?

Requires Free Membership to View

You should read the release notes, as well as check the Web site for your particularly operating system as a starting point. Not all operating systems will allow you to share a LUN and make it accessible from two servers assuming they are the same type of operating system. Take a look at the mount commands for your particularly operating system to see what is supported. Even after forcing a bus reset, the filesystem and your operating system on the second server will need to be aware of the file. This is where distributed filesystems and NAS can be of help.

This was first published in October 2004

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: