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Samsung may end SATA SSD production soon

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108 points Krontab | 2 comments | 15 Dec 25 14:51 UTC | HN request time: 0.449s | source
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xyse53 ◴[15 Dec 25 16:02 UTC] No.46276223[source]▶
I've noticed there aren't a lot of reasonable home/sb m.2 NVME NAS options for main boards and enclosures.

SATA SSD still seems like the way you have to go for a 5 to 8 drive system (boot disk + 4+ raid6).

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rpcope1 ◴[15 Dec 25 16:24 UTC] No.46276576[source]▶
It seems like it's rare to find M.2 with the sort of things you'd want in a NAS like PLP, reasonably high DWPD, good controllers, etc. and you've also got to contend with the problem of managing heat in a way I had never seen with 2.5 or 3.5 drives. I would imagine the sort of people doing NVMe for NAS/SAN/servers are all probably using U.2 or U.3 (I know I do).
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8cvor6j844qw_d6 ◴[15 Dec 25 16:37 UTC] No.46276750[source]▶
Its also quite difficult to find 2280 M.2 SATA SSD. Had an old laptop that only takes 2280 M.2 SATA SSD.

Its always one of the 2. M.2 but PCIe/NVMe, or SATA but not M.2.

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barrkel ◴[15 Dec 25 17:11 UTC] No.46277254[source]▶
Fwiw, SATA and NVMe are mutually incompatible concepts for a single device; SATA drives use AHCI to wrap ATA commands in a SCSI-shaped queuing mechanism called command lists over the SATA bus, while NVMe (M.2/U.2/add-in) drives talk NVMe protocol (multiple queues) over PCIe.
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wtallis ◴[15 Dec 25 17:56 UTC] No.46277943[source]▶
For a drive, yes, SATA and NVMe are mutually exclusive. The M.2 slot can provide both options. But if you have a machine with a M.2 slot that's only wired for SATA but not PCIe, your choices for drives to put in that slot have been quite limited for a long time.
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1. verall ◴[15 Dec 25 18:24 UTC] No.46278309[source]▶
There were even M.2 PCIe-connected AHCI drives - both not-SATA and not-NVMe. Samsung SM951 was one. You can find them on ebay but not otherwise.
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2. wtallis ◴[15 Dec 25 18:31 UTC] No.46278393[source]▶
At least the Samsung and SanDisk PCIe AHCI M.2 drives were only for PC OEMs and were not officially sold as retail products. There were gray-market resellers, but overall it was a niche and short-lived format. Especially because any system that shipped with a PCIe M.2 slot could gain NVMe capability if the OEM deigned to release an appropriate UEFI firmware update.