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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.

...ote: > 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. 512n drives still exist, although they tend to be a bit smaller, 2TB or less. http://www.hgst.com/tech/techlib.nsf/techdocs/FD3F376DC2ECCE68882579D40082C393/$file/US7K4000_ds.pdf 4Kn drives are appearing now also. I don't expect these drives to be bootable except possibly by systems with UEFI firmware. It's also possible hardware RAID will reject them unless explicitly supported. http://www.hgst.c...

...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. > > 512n drives still exist, although they tend to be a bit smaller, 2TB or > less. > > http://www.hgst.com/tech/techlib.nsf/techdocs/FD3F376DC2ECCE68882579D40082C393/$file/US7K4000_ds.pdf > > I too noticed that HGST (now owned by WD) makes native 512n drives. That pdf states that they come in 2,3,4 TB models. (A6 in the model # represents 512n). But there are almost no reviews on these HGST native 512n drives...

Hi al Does anyone here that knows if the new 7K3000 drives from Hitachi uses 4k sectors or not? The docs say "Sector size (variable, Bytes/sector): 512", but since it''s variable, any idea what it might be? I''m planning to replace 7x3+1 drives on this system to try to get some free space on some full VDEVs. If the drives are in fact 4k sector drives, will it be possible