April 10, 20215 yr Hi guys, Feeling a little stupid. My large torrents writing directly to UNRAID NAS kept failing. I tried everything and read that this can happen with SMR drives. I thought to myself, no way, not me. I just bought these used datacentre quality drives! running a few of these: HUS726T6TALE6L4 - 6TB and one of these cheap consumer drives: ST4000DM000 - 4TB I've googled, but can't get a definitive answer - Tell me it isn't so...
April 10, 20215 yr 28 minutes ago, sannitig said: I've googled, but can't get a definitive answer - Tell me it isn't so... This article indicates the HUS726T6TALE6L4 model is CMR/PMR and is not SMR. Edited April 10, 20215 yr by Hoopster
April 10, 20215 yr Author Well that's good, it's a CMR/PMR. Thank you for sending that over and putting me at ease. So it's probably that the ST4000DM000 drive is the culprit then.....or that this is some other issue with qbitorrent and UNRAID
April 10, 20215 yr 18 minutes ago, sannitig said: So it's probably that the ST4000DM000 drive is the culprit That drive is also CMR. The DM004 model is SMR. There could be some other issue with the drives, but SMR is not at the root of the problem.
April 13, 20215 yr Coincidentally, I'm looking at the HUS726T6TALE6L4 and HUS726T6TALN6L4 drives, and as far as I can tell, the only difference between them is NOK 50 in price and that the HUS726T6TALE6L4 is a 512e drive and the HUS726T6TALN6L4 is a 4Kn drive. The cost difference is negligible for a 4-drive purchase, but I'd like to get the better performer of the two if there even is a "better" rather than just "slightly different". The E drive is 512e sector aligned and emulates 4K sectors, and the N drive is 4K natively sector aligned. For just storage, will I even see a difference in performance either way I go as long as they are all the same and the drives aren't SMR (which they aren't)? With regards to controller support, I read that some controllers don't support 4kN drives as the technology is "too new", but my understanding is that it's been supported in Linux since 2009 (kernel 2.6.31+). Will an LSI 9240-8i HBA (PCIe2 x8) work?
April 13, 20215 yr 15 minutes ago, reverend remiel said: Will an LSI 9240-8i HBA (PCIe2 x8) work? Only if it's flashed to 9211-8i IT mode.
April 13, 20215 yr 52 minutes ago, JorgeB said: Only if it's flashed to 9211-8i IT mode. In that case I might as well pick up a 9211-8I and save a few bucks. Thanks.
April 13, 20215 yr 51 minutes ago, reverend remiel said: In that case I might as well pick up a 9211-8I and save a few bucks. Thanks. On second though, I believe only the 9207-8i and above support 4kn. Let me check.
April 13, 20215 yr 1 hour ago, reverend remiel said: In that case I might as well pick up a 9211-8I I never tested myself, but from searching the net the 9211-8i supports 4kn in IT mode, RAID mode requires 9207 or above.
April 13, 20215 yr 2 minutes ago, JorgeB said: I never tested myself, but from searching the net the 9211-8i supports 4kn in IT mode, RAID mode requires 9207 or above. Since I'll be using it for my secondary internal storage enclosure with unRAID, I don't need the RAID functionality. That's excellent, thanks again!
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