I have a RAID6 config, with 3ware 9650SE-8LPML card and 6x Seagate Barracuda 3000GB running from early 2012 (May?). Those HDD were quite big for that time. They always made a strange noise when searching for data or turning on after a while, but I searched in internet and some folks told me it was normal for this HDD.
One month ago one the controller started to notify a drive problem with had some damaged sectors. I decided to remove the drive and remap the RAID6 with 6xdrives instead of 7. Yesterday another drive started to made a continously loud noise, like it was broken inside. I removed the drive and replaced it whit the drive I removed 1 month ago which was not physically damaged. The RAID rebuit itself and today evening everything was working fine.
20 minutes ago another drive (not the one I replaced yesterday) started to make the same noise I got yesterday from the broken HDD. RAID controller says CONFIG FAILURE to the drive, or simply doesn't show it. Both drives (yesterday and today) make this noise only with the power SATA cable, and without signal cable.
Is it possible that 2 drives are really broken?
Is it possible that the RAID controller is breaking the drives?
Should I plan to replace all those drives within the next months, because they're coming at the end of their lifes? I already bought a new 6TB WD Red HDD. If all 3TB drives need to be replaced in a few months, I will use the new 6TB WD Red disks as replacement for the old 3TB Seagate using only half of the space until the all drives are replaced... Otherwise I will create a new RAID. Is it risky to use the new WD RAID with this controller?
Very interesting article: LINK