SSDs - are they worth it?
On price per GB certainly not but then what do you use your storage for? In the enterprise they always talk of tiered storage. You put the disk intensive stuff on the fastest drive you can afford, then the rest goes on something that is reasonably quick but cheap to buy in bulk, then you go for something that is so cheap per GB but slow as wading through porridge where you only put the really old stuff, then there is archive to tape where you are talking minutes/hours or even days to get back to the user. In old days you had SCSI, IDE and tape, the disk were arrange in to RAID arrays, these stated simply with stripe sets of a few disks and mirrored pairs of disks, then you got redundant disks with raid 5 just in case something failed. Typically a database box would have system on a mirrored pair, Logs on mirrored pair and DB on a raid 5 of 3 or more disks depending on the size of the beast. Then along came SANs but these were just glorified storage shelves with the disk arra...