Le Mon, 30 Oct 2017 16:43:15 +0000
Kyle Ames <kyle.ames@xxxxxxxxxxx> écrivait:
> OS: CentOS 7.3
> Kernel: 3.10.0-693.2.2.el7.x86_64
> RAID: LSI RAID controller - RAID 6 with 10 disks - Strip Size 128
> (and thus a stripe size of 1MB if I understand correctly) LVM: One
> PV, VG, and LV is built on top of the RAID6. The output is below.
>
> RAID output:
> -----------------------------------------------------------------
> DG/VD TYPE State Access Consist Cache Cac sCC Size Name
> -----------------------------------------------------------------
> 0/0 RAID6 Optl RW No RAWBD - ON 72.761 TB DATA
>
> ----------------------------------------------------------------------------
> EID:Slt DID State DG Size Intf Med SED PI SeSz Model
> Sp Type
> ----------------------------------------------------------------------------
> 18:0 35 Onln 0 9.094 TB SAS HDD N N 512B ST10000NM0096
> U - 18:1 39 Onln 0 9.094 TB SAS HDD N N 512B
> ST10000NM0096 U -
Please note that 10TB disks are using 4k blocks. It's not the culprit
here, but using 512b emulated definitely isn't optimal for RAID
performance.
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