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If you are expanding the existing arrays, you will need to use 15k SAS drives. Mixing different speeds of drives in a single array will lead to strange results - at best, everything will slow down to the speed of the slowest drive. NLSAS drives are basically 7.2k RPM SATA drives with a SAS controller on the drive, so they are much slower. If you are ...


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You likely have a backplane failure on the HP ProLiant ML370 G3 server you're using. That system is over 12 years-old and has been end-of-life for 10 years. It sounds like you had a spare chassis to allow you to continue working, so that's good. But by process of elimination, if the disks are okay and the RAID controller is okay, then the backplane is the ...


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If you're using a hardware RAID controller, HDD-B will almost certainly be recognized as a "foreign" drive if you're using enterprise class hardware (which should be fair to assume according to the proper scope of SF questions). Hardware RAID controllers write unique identifying data to distinguish between drives from other controllers. Even if you were able ...


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Your operation plan is OK. The only addition to it is that after having removed the disk and rebooted the machine, you will have a disk in the "failed" state. To completely remove any reference to such disk, you had to issue the following command: mdadm <mdarray> --remove <faileddisk> Obviously, substitute and with the read device names. A ...


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I have spent the last year (off and on through 2014-2015) testing several parallel CentOS 6.6 RAID 1 (mirrored) configurations using 2 LSI 9300 HBA verses 2 LSI 9361-8i RAID controllers with systems built on the following: 2U Supermicro CSE-826BAC4-R920LPB chassis, a ASUS Z9PE-D16 motherboard, 2 Intel Xeon E5-2687W v2 Eight-Core 3.4 GHz Processors, mirrored ...



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