Oh, absolutely.ok - but if that is true then you are out of spec just for the SATA drives alone (i.e., if your net effective cable length is over 1m then the SATA drives are not guaranteed to work even if you are not mixing in SAS drives).
I concur, heard the same but I do it, not saying you should but I have never experienced any issues. Mostly sata here but I'd take sas anyday over sata in a large array if $ was not an option and intend to replace my sata w/ sas drives 'someday'...especially because I come off LSI 2008 to Intel sas expander and than to my backplanes/disks.I have that configuration in use in a few places and never ran into issues with it. Wonder which systems are more/less tolerant of that configuration.
The most common issue when using SATA drives with a SAS backplane / controller is problems with SAS expanders. If a SATA drive "loses its marbles", the other drives on that same expander may drop offline. This will cause RAID to mark multiple drives as offline, potentially corrupting the RAID volume. In systems without expanders, I've had no problems using generic SATA drives, though I normally use "RAID edition" type drives. If I had to use generic non-RE drives, I'd use a host-based solution like ZFS, rather than relying on a RAID controller to "do the right thing".I have heard this for years. What is the reasoning behind it? Does SAS handle things better if a drive goes nuts and keep the storage system stable or something?
yeah I know.... lost one drive in a Raid volume... my 3ware kicked 2 other members.The most common issue when using SATA drives with a SAS backplane / controller is problems with SAS expanders. If a SATA drive "loses its marbles", the other drives on that same expander may drop offline. This will cause RAID to mark multiple drives as offline, potentially corrupting the RAID volume. In systems without expanders, I've had no problems using generic SATA drives, though I normally use "RAID edition" type drives. If I had to use generic non-RE drives, I'd use a host-based solution like ZFS, rather than relying on a RAID controller to "do the right thing".