On 14/08/2021 11:37 pm, Bob Friesenhahn wrote:
On Sat, 14 Aug 2021, Carl Brewer wrote:Rather than use a couple of 1TB WD red pros or Blacks, is it a good choice to run a ZFS root mirror on a couple of SSDs? I figure I'd only need 250MB or so, all the data etc will be on spinning drives in a raidZ-something array, the root system - apart from swap, will be pretty static read-mostlySo I'm considering running a couple of Samsung 250GB SSDs, any thoughts or war stories before I go and buy them? Is it better to stagger them in terms of age, or different brands/models so they don't both run out of writes at the same time? Is this setting me up for a disaster in 3 years, or will it be predictable and easy to maintain?As long as the BIOS is happy and finds the devices, there should be no problems.
It was happy with the WD green 250GB SATA SSD. I haven't got an m.2 lying around to check, but I suspect that might be my best bet.
There are not normally a lot of writes to the ZFS root pool. It is wise to make sure that the type of product you choose will still exist in the future in case you need to replace it. SSDs may fail for reasons other than excessive writes.I am using a pair of Samsung 250GB M.2 SATA SSDs for boot for many years already (since 2015) with no issues.
Are you putting swap onto something else or just letting it use the SSDs? Thank you Carl
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