On 28/08/2020 03:31, R. Ramesh wrote:
I want to build new raid using the 16/14tb drives. Since I am building
new raid, I thought I could explore caching options. I see a mention of
LVM cache and few other bcache/xyzcache etc.
Is anyone of them better than other or no cache is safer. Since I
switched over to NVME boot drives, I have quite a few SATA SSDs lying
around that I can put to good use, if I cache using them.
Sounds like a fun idea. Just make sure you're getting CMR not SMR
drives, but I'm not aware of SMR that large ...
Hopefully I'm going to do some work on it soon, but look at dm-integrity
to make sure you don't get a dodgy mirror. You can add dm-integrity
retrospectively, so if you leave a bit of unused space on the drive, I
think you can tell dm-integrity where to put its checksums.
Cheers,
Wol
