Everything, Everything

Cold Caller: Hello Me: Hi CC: It's Linda from BT Openreach. I'm calling to talk to you about your Internet connection. Me: Which one? CC: Your broadband Internet connection. Me: I have two broadband connections, which one? CC: *hangs up*
28 days, 23 hours, 3 minutes ago
Hoping Graham Norton is on top form tonight for #EurovisionSongContest. Most of the songs will undoubtedly be awful, but it could be an impressive looking show.
31 days, 15 hours, 42 minutes ago
What I want from Windows: updates that don't break things; ability to expand/shrink a RAID 5 volume without third party software. What I need: WHQL network drivers that don't cause a BSOD. What I'll get: hardware accelerated text in Terminal and a Linux Kernel.
42 days, 5 hours, 15 minutes ago
Have Western Digital finally released a 12TB Red drive? WD120EFAX is listed here as a 5400rpm drive, but it's not in their datasheet and you can't buy it from their website: https://t.co/yizuALS2gO
43 days, 5 hours, 31 minutes ago
Samsung 860 QVO Trim Support
Tuesday 18th June, 2019 09:05
While investigating SAS HBA cards I discovered that the LSI cards only support TRIM if the drives report the following ATA options:
  • Data Set Management TRIM supported (limit 8 blocks)
  • Deterministic read ZEROs after TRIM
Surprisingly, some popular drives such as the Samsung 850 Pro (and allegedly all Samsung SSDs before the 860) don’t report “Deterministic read ZEROs after TRIM".

I found output from the 860 EVO that shows it supports DRZAT, but with the QVO drives being cheaper alternatives I wondered if they'd been nerfed at all. While I'd found instructions to use hdparm and which bytes to look at in some tools, it turns out that Hard Disk Sentinel reports these things (even in the trial version). I can't tell the limit, which they claim needs to be 8, but I've read elsewhere that 4 still works, and I'd assume the EVO and QVO drives have the same limit).

Samsung 860 QVO Trim Support

The good news is these drives appear to support TRIM well enough that they can be safely hooked up to the LSI 9300-8i (and similar controllers). But that card doesn't explicitly list driver support for Server 2019, so I may go for the 9400-8i instead (the heatsink is much larger too - I've read that the heatsink on the 9300 can get quite hot) as that lists 2019 in the driver on their website. It also supports NVMe, which would help future proof the card.

Now I just need to save up some money to buy the controller and some additional QVO drives and test it out.
© Robert Nicholls 2002-2019
The views and opinions expressed on this site do not represent the views of my employer.
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