dikkiedirk Posted February 12, 2012 Share Posted February 12, 2012 Which 2.5" drives are suitale for either a cache or parity drive? Performance-wise I mean. No SSDs! Link to comment
pantner Posted February 14, 2012 Share Posted February 14, 2012 You'd want to go for the 7200RPM models. So the WD Blacks, Seagate Momentus 7200.x or other brand's drives. I wouldn't suggest one for a parity, as you'd be limited to that size for your largest array drive.ie, you parity drive has to be equal too, or larger than your largest array HDD. So, if you get a 750GB Parity drive, you can't use 1TB/1.5TB/2TB/3TB/Etc for a cache drive, it would probably be ok to look at one. You can really use any one you want, but there is another thread here where someone has used a WD Blue (5400RPM) and can't see any speed difference with the cache drive, so you probably want a 7200RPM drive. Link to comment
dikkiedirk Posted February 14, 2012 Author Share Posted February 14, 2012 Yes, you are right about the parity drive. 2.5" capacity is still limited to 1 TB I think. A 500 GB or 1 TB would be possible. Link to comment
WeeboTech Posted February 14, 2012 Share Posted February 14, 2012 I wouldn't use a 2.5" drive for parity. 1. you are limited by size 2. you are limited by speed For cache, I might choose a seagate momentus 750 7200 rpm. or some other "high density" 7200 rpm drive. Maybe even a WD VelociRaptor, but then you have the heatsink. As much as I like the seagate momentus xt's I'm not sure I would spend the extra amount for it unless it was going to double duty as an apps drive. You need a high density drive in order to get the throughput to make it worthwhile for the expenditure. Link to comment
c3 Posted February 15, 2012 Share Posted February 15, 2012 I think the biggest drawback for using 2.5 inch drives is price/GB. Overall they offer excellent performance, but with a higher price and more dense heat load. I use the 600GB 10k drives in RAID6 for my iSCSI storage. Link to comment
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