September 30, 201114 yr I had some issues with an improper shutdown and am running a parity check, the reads for the pairty drive and first 6 disks in the array are all staying very close in number, the last 4 disks are showing 1/3 or less the number of reads, all the drives are the same size , 6 are connected to the motherboard connections and 6 are connected to 3 different 2 port pci expres sata controllers. here's a list of the drives and their reads partway through, I zeroed it out and waited a bit then took this snapshot. I've listed where each drive is hooked up as well Temp Size Free Reads Writes Errors Parity (sdh) 28°C 2 TB - 421925 0 0 Motherbaord Disk 1 (sdi) 27°C 2 TB 132.81 GB 420526 0 0 Motherbaord Disk 2 (sdj) 26°C 2 TB 197.19 GB 419893 0 0 Motherbaord Disk 3 (sdk) 27°C 2 TB 116.5 GB 419486 0 0 Motherbaord Disk 4 (sdl) 27°C 2 TB 168.32 GB 423743 0 0 Motherbaord Disk 5 (sdm) 27°C 2 TB 187.37 GB 421847 0 0 Motherbaord Disk 6 (sde) 28°C 2 TB 981.58 GB 418824 0 0 PCIE2 Disk 7 (sdf) 26°C 2 TB 879.83 GB 131932 0 0 PCIE3 Disk 8 (sdc) 27°C 2 TB 1.41 TB 121068 0 0 PCIE1 Disk 9 (sdb) 27°C 2 TB 2 TB 145137 0 0 PCIE1 Disk 10 (sdg) 26°C 2 TB 2 TB 123429 0 0 PCIE3 Cache (sdd) 28°C 1 TB 1 TB 0 0 0 PCIE2 Does this seem normal due to the way the drives are connected or is something odd happening?
September 30, 201114 yr The disks might be the same size, but different disk controllers and make/model/firmware drives are probably involved, with different on-disk cache memory and buffer sizes too. It is very normal. Joe L.
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