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2015 Feb 28
1
OT: AF 4k sector drives with 512 emulation
...emulation still has a small RMW performance hit from writes that are smaller than 4k or if the writes are not a multiple of 4k. Also it's probably not a good idea to mix 512e with 512n in a raid set. Although this may be hard to avoid as drives fail in the future. [1] http://i.dell.com/sites/doccontent/shared-content/data-sheets/en/Documents/512e_4Kn_Disk_Formats_120413.pdf
2015 Feb 27
4
OT: AF 4k sector drives with 512 emulation
Still have good quality older sata hardware raid cards that require 512 bytes/sector. As far as I know HD manufacturers are not making native 512 bytes/sector drives any more. Some have better 512e emulation than others. Looking for some advice on which to avoid and which are recommended. Thanks. PS this is for a CentOS6 server.