![]() ![]() Start with replacing the most ragged disk. Do the rebuild one disk at a time, not both. ![]() Worst case, you'll need to restore some files or the whole array from backup. You'll also see filesystem I/O errors in dmesg if you've actually been running into filesystem level corruption. However, a drive can have been going bad for quite some time before triggering its overall SMART health report.Įven if it's not fine, perform the rebuild and do a consistency check + filesystem check. Regarding your adapter, if you're not running manufacturer "certified" drives in your controller, your controller won't necessarily be so intelligent about ejecting members when they begin to fail - typically only being able to eject them when they drop out or report a serious SMART failure. I've no idea how old these media errors are, though. However, depending on your operating environment, there may be additional steps involved: For Linux. Your controller log would be a good place to see if that's happened during at least the last few patrol reads. While it’s not a very complicated process to configure a virtual drive on a Cisco UCS C-Series server with a LSI MegaRAID controller, I noticed that I’ve been asked a few times about the process so I took a few screenshots for the purpose of writing this post during a recent Cisco UCS C210 M2 server with a LSI MegaRAID controller deployment. For the most part, standard monitoring of LSI MegaRAID RAID controller expansion cards are provided out-of-box as long as SNMP is enabled on your device and the sassnmp and sasirsnmp packages are installed from LSI. You also have a hot spare, and that should act as a "spillover" space for most controllers - though I'm not certain if your controller will do this because I don't know what it is.Įven if your controller does not use a hot spare as scratch space or emergency space it should still have been doing patrol reads regularly, which may have detected these issues and relocated data areas. If they are, you're almost certainly fine. The LSI MegaRAID Storage Manager (MSM) is a software application with a graphical user interface that enables you to configure, monitor, and maintain storage configurations on LSI MegaRAID SAS controllers. Make sure both of those drives are members of opposite RAID 1 arrays. Depending on which of those drives are failing, you may not be screwed one bit. You can lose two entire drives in a four drive RAID 10. Check your filesystems after repairing your array, in case there was silent data corruption. ![]()
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