Personal computing discussed
Moderators: renee, morphine, Steel
just brew it! wrote:That's pretty weird. The only semi-plausible theory I can think of is, if the torrent client is (as I assume) using multiple download streams from multiple sources, and writing everything to disk as it comes in, the file may not be getting laid out sequentially on the disk. So when you go to read it back, there's some extra seeking involved, which impacts throughput.
just brew it! wrote:Are these new-ish drives?
If you know the full model number of the bare drive inside the external enclosure we may be able to confirm/refute whether it is SMR.
Some SMR implementations (and IIRC WD's is one of them...) can do all sorts of weird sector/zone remapping
Krogoth wrote:I'm afraid it looks like that HDD SKU is infected with shingles.
Noldor wrote:Krogoth wrote:I'm afraid it looks like that HDD SKU is infected with shingles.
It's SMR?
just brew it! wrote:Noldor wrote:Krogoth wrote:I'm afraid it looks like that HDD SKU is infected with shingles.
It's SMR?
Looks like it.
Unfortunately Seagate isn't a solution either, since they also have a number of SMR drives in their lineup. And manufacturers have been known to switch the model of bare drive used in a given model of external drive, so buying the same model of external as one that was non-SMR in the past is no guarantee either.
The only way to be sure these days is to do some research, buy a bare drive that you KNOW is non-SMR, and put it in a third-party enclosure.
Known to be infected (AVOID): Most (if not all) of Seagate Barracuda Compute (non-Pro) line; select models of WD Blue and Red (seems to be mostly the ones with 256MB cache)
Known clean (at least for now): Seagate Ironwolf; WD Red Pro; WD Purple
Noldor wrote:Until now Seagate did not give me any trouble, though.
just brew it! wrote:Noldor wrote:Until now Seagate did not give me any trouble, though.
I would assume you have not encountered any of the SMR Barracuda Compute drives then. They are horrible. I got burned quite badly buying a pile of them a couple of summers ago to upgrade the capacity of my home server. Had to replace them all. I now use those drives solely for external backups, and just put up with the crappy performance since I don't really care if the backup (and verify... I verify my backups) takes all night (or even longer).
Noldor wrote:just brew it! wrote:Noldor wrote:Until now Seagate did not give me any trouble, though.
I would assume you have not encountered any of the SMR Barracuda Compute drives then. They are horrible. I got burned quite badly buying a pile of them a couple of summers ago to upgrade the capacity of my home server. Had to replace them all. I now use those drives solely for external backups, and just put up with the crappy performance since I don't really care if the backup (and verify... I verify my backups) takes all night (or even longer).
What does this poor performance consist of? Slow writes, slow reads or something else?
meerkt wrote:
just brew it! wrote:Noldor wrote:Krogoth wrote:I'm afraid it looks like that HDD SKU is infected with shingles.
It's SMR?
Looks like it.
Unfortunately Seagate isn't a solution either, since they also have a number of SMR drives in their lineup. And manufacturers have been known to switch the model of bare drive used in a given model of external drive, so buying the same model of external as one that was non-SMR in the past is no guarantee either.
The only way to be sure these days is to do some research, buy a bare drive that you KNOW is non-SMR, and put it in a third-party enclosure.
Known to be infected (AVOID): Most (if not all) of Seagate Barracuda Compute (non-Pro) line; select models of WD Blue and Red (seems to be mostly the ones with 256MB cache)
Known clean (at least for now): Seagate Ironwolf; WD Red Pro; WD Purple
The days of being able to just buy any random model of HDD, and expect it to perform, well, like a normal HDD, are gone. Probably for good, unless someone manages to challenge this sort of behavior in court and forces the manufacturers to note in their marketing literature which drives are SMR. Most of the non-enterprise ones don't even mention it in the technical data sheet, which is unforgivable IMO.
At least be thankful you're not trying to use it in a RAID array. Running a workload that does a lot of random writes to a RAID array containing drive-managed SMR drives can actually cause the entire array to degrade and fail due to I/O timeouts on the SMR drives.
DiMaestro wrote:Seagate enterprise drives do not have this. Get a IronWolf - no SMR.
just brew it! wrote:DiMaestro wrote:Seagate enterprise drives do not have this. Get a IronWolf - no SMR.
Not entirely true. Some of their enterprise drives are SMR, but they do (and AFAIK always have) mentioned it in the specs when this is the case. It was the consumer line where all the obfuscation occurred.
And yes, IronWolf should be safe.
DiMaestro wrote:You're correct. I should have specified Iron Wolf at first. Does WD have any drives that they say are SMR free?
just brew it! wrote:DiMaestro wrote:You're correct. I should have specified Iron Wolf at first. Does WD have any drives that they say are SMR free?
After all the brouhaha in the tech press, I believe they have updated their site to indicate which model numbers of internal drive are CMR and which are SMR. But I don't think this helps with USB externals (which this thread was originally about). Hence my recommendation to put an internal drive in a 3rd party enclosure. Unfortunately this costs more than just getting a USB external from the get-go.
DiMaestro wrote:just brew it! wrote:DiMaestro wrote:You're correct. I should have specified Iron Wolf at first. Does WD have any drives that they say are SMR free?
After all the brouhaha in the tech press, I believe they have updated their site to indicate which model numbers of internal drive are CMR and which are SMR. But I don't think this helps with USB externals (which this thread was originally about). Hence my recommendation to put an internal drive in a 3rd party enclosure. Unfortunately this costs more than just getting a USB external from the get-go.
Man I must be old - I can't imagine using a USB enclosure or dock for anything I consider important. Dockwise if it doesn't support Esata I won't even bother with it. USB 3 is ok - but I've seen it just fall over itself when the CPU is in high use.
Nothing but a real NAS/Storage machine for me.
The hard drives are completely worthless for their intended purpose—and are in fact dangerous to customer data.