smartctl will tell you, I think? - but I'll save you some time, the manufacturer datasheet shows these 2.5" drives all have 128MB of on-disk cache;
Not sure on the commands but the data sheet shows 128Mb, beyond that crystal disk info usually reports it.I'm awaiting delivery of a SM CSE-219A-R920UB chassis, gonna be loading it with the 5TB ST5000LM000. So far bought only 1 drive for testing. I shucked it from externals. Haven't found any commands that will report the actual cache size on the disk. Does anyone have a freebsd command to print such info about a disk?
Also waiting eagerly on perf reports from other users here on the ST5000LM000 drives in a RAID setup.
Some single disk tests, performance in the lower stripe sizes seem unstable and vary from time to time:
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Totally missed this because it was on the next page +1 for datasheets!smartctl will tell you, I think? - but I'll save you some time, the manufacturer datasheet shows these 2.5" drives all have 128MB of on-disk cache;
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https://www.google.com/url?sa=t&sou...EAioQFghzMAA&usg=AOvVaw20K5HeZ4NFVR7khlU_ZREdI was at a shop yesterday where they had Seagate STEF4000400's at €111 a piece (European number), which is reasonable here in Germany, does anyone know what drivers are in these boxes - I can't find anything on them?
Perfect, I'll pick one of them up to see if that is the case, that would make it fairly cheap to build a small storage tank.https://www.google.com/url?sa=t&sou...EAioQFghzMAA&usg=AOvVaw20K5HeZ4NFVR7khlU_ZREd
It looks like they're a emea version of the expansion plus, it should be the same 4tb 2.5 inch drive as the backup plus from what I can see but without opening one I can't be 100% sure
I ended up getting some 3.5" 4TB WD Red's instead, as they where almost the same price. But I'll pick one up shortly and report back - can't say when, but hopefully before Christmas.Would appreciate it if you post your findings Casper I've also come across some of those, pretty cheap.
I've put a small power supply from an old Shuttle PC in the 5,25" bay. Shorted the pwr_on to ground, and removed unnecessary cabling.@b3nno: Very nice, but how are you going to power it now?
If you figure out a use for them let me know. I've got a stack of 'em that aren't doing diddly dick and loathe putting them back in my server.I could well be wrong, but the above experience says to me that these are prototypical SMR drives.
I will give them another chance, though, and as noted, will be seeing if there are any ways to squeeze some more performance out of them.