8570 Views 3 Replies Latest reply: Feb 2, 2009 5:54 AM by MrHoffman
Seeing as its just one drive I don't think its the controller? Otherwise you'd probably be seeing problems with the whole array - think about it? Besides are you having problems accessing the data?
It's been some time but as I remember an LBA error generally indicates a failed or failing drive. I'd get it changed as soon as you can if I were you. The longer you leave it the more chance of another drive failure with the potential for complete data loss. You do have a current and effective backup don't you?
However things might get tricky? Depending on how long you've had the XServe RAID and the size of the ADMs (180GBs, 250GBs or 400GBs) you might find the only drives available are the 750GBs. If you are not already at 1.5 for the firmware you should be thinking about installing it soon.
If you've only one array it might be of benefit to populate the other array with 750GB ADMs first. Transfer data across and upgrade the existing array to 750GBs as well. Deciding to do this will be expensive. Replacing the failing drive with a single 750 will mean losing the extra capacity if the array is based around 180s, 250s or 400s.
Rotating media fails. Somewhere around 2 to 13% of the disks in a pool will fail per year, IIRC. And rotating disk media from the same manufacturing batch can fail together.
Get a few replacement drives on-site pronto, and swap out this drive for a spare.
Pending the arrival of the replacement disk, confirm your data archives are current. RAID protects against single-spindle failures. And you're arguably already there. RAID does not protect against multiple-spindle failures nor corruptions nor application failures nor accidental nor malicious deletions.
Multiple-spindle failures in RAID arrays are surprisingly common (including secondary failures during RAID member recovery) and SMART data is not predictive and MTBF ratings are, um, optimistic; all based on Google and CMU real-world studies of disk failures.
Xserve RAID can be configured to email these messages, too.