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Running the drives using the IT mode firmware and correctly aligned partitioned gets about 100mb/s seq writes back.
Same drives, with IR mode firmware get only 44mb/s seq writes.
So how do I go about aligning the partitions properly when using RAID?
My guess would be that the RAID controller is writing a physical block at the start of the disk for identification and lying about the logical block location to the software and this is throwing the alignment out of whack.
Any clues much appreciated!
Hardware is LSI 1064e SAS controller, IR mode firmware. Hitachi SATA 2TB drives which are 512e (i.e. 4096 byte sectors emulating 512).
Software is W2k3 as the OS. Using GParted and AOMEI to try and align the partitions.
Same drives, with IR mode firmware get only 44mb/s seq writes.
So how do I go about aligning the partitions properly when using RAID?
My guess would be that the RAID controller is writing a physical block at the start of the disk for identification and lying about the logical block location to the software and this is throwing the alignment out of whack.
Any clues much appreciated!
Hardware is LSI 1064e SAS controller, IR mode firmware. Hitachi SATA 2TB drives which are 512e (i.e. 4096 byte sectors emulating 512).
Software is W2k3 as the OS. Using GParted and AOMEI to try and align the partitions.