28 Jan
2021
28 Jan
'21
15:20
28.01.2021 17:21, Per Jessen пишет:
No, harddisks generally have write cache disabled
Consumer hard disks generally have write cache enabled because it is good for benchmarks (and performance as perceived by users). [ 1.894064] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
They are not specifically made for raid - WDC used to have a series called "RAID edition", but I think they've stopped that.
They usually have different default settings (well known recovery timeout as example) and may have better quality control. HDD write cache is controlled by RAID controllers (which can explicitly enable or disable it or just leave it as is).