March 14, 201115 yr I recently purchased two of the new Seagate ST2000DL003 (Sata III) drives, they pre-cleared fine, I have one as parity and the other I added to the data population. Today I tested the speed of a few of the drives in the system using hdparm -t and the two Seagate’s returned the following results: /dev/sdh: (Parity) Timing buffered disk reads: 384 MB in 3.01 seconds = 132.79 MB/sec /dev/sdj: (Data) Timing buffered disk reads: 246 MB in 3.01 seconds = 81.74 MB/sec Bit of a difference eh? In fact based on the results the second Seagate is the slowest drive in the server. I’m going to try a different sata cable later today to see if it makes any difference, other than that the only difference between the two drives is placement: I have two Supermicro CSE-M35T1 backplanes in my system - the parity drive along with my cache drive is mounted elsewhere and is connected to the motherboard directly (ie no caddie) the second Seagate is in one of the CSE-M35T1’s and I’m wondering if this could be the problem as the CSE-M35T1’s are only rated Sata 150. That said - the other (sata II) drives all work fine and return good results so I wondered if anyone had any thoughts. Thanks in advance
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