Clear the Unreadable Sectors message on Dell MD3000i

I wrote last week about having to manually fail a disk with faulty sectors in a MD3000i Disk Array before Dell came on site to swap the drive over.

After the Dell tech had left, and the SAN had rebuilt,the new disk, the Unreadable Sectors error was still present. The below commands clear the Unreadable Sectors message on Dell MD3000i

To mark all unreadable sectors as good once again, the following command had to be repeated in smcli.exe. (See previous post for details on smcli.exe)

clear allVirtualDisks unreadableSectors;

After this command the array appears to be fully functional and back as it was.

Manually failing a disk on a Dell PowerVault MD3000i SAN Array

Yesterday I had an issue appear in Dell MDSM (Modular Disk Storage Manager), which reported unreadable sectors detected. In MDSM I went to the Support tab and chose gather support information in order to save the support information to a zip file on the server running MDSM.

Inside this zip file was a file called unreadableSectors.txt. This file showed that the disk in slot 5, enclosure 0 was the source of these issues.

We had a hot spare available in slot 14, so before getting Dell to replace the faulty disk I decided to mark the disk as failed and get the Hot Spare to kick into action. Manually failing a disk on a Dell PowerVault MD3000i SAN Array is quite straight forward, but it isn’t something that is available in the MDSM gui. Below is the path to the utility and the command to fail disk 5.
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Presenting VMware LUNS to a Windows based server using iSCSI

Just finished my Veeam Technical certification online as a part of the “Veeam University”. I was reminded of the issues with presenting an iSCSI VMware LUN to a Windows based server, which is something that is second nature for me now, but I still see it as quite a trap for those starting off with products like those offered by Veeam.

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