Originally posted by: alimoalem
from a quick 2-minute check of prices, the cheapest 36GB 10K SCSI drive is $36 and 15K $81. the 36GB 15K rpm is not going to be much faster (if faster at all) than most modern 250GB 7200rpm SATA drives. it's also the same price as the 250GB drives and much smaller. rpm is not all that matters when it comes to harddrives, platter density matters too. the larger the platter density, generally the faster the drive.
unless you're going with at least a 74GB SCSI drive, i find it useless for the hassle of getting all the parts and setting it up to not get improved performance
EDIT: i just saw in ur sig if you have a 36GB raptor. i think the 36gb raptor is actually slower than the seagate 7200.10 250gb and western digital's newer 7200rpm drives. i would think the SCSI drive you consider getting (seeing as it most likely will be one of the older ones) will perform similarly to the raptor you have