SAS versus SATA Hard Drive for Dell Precision T7500 Workstation
Posted on 2009-05-19
One more question comes up as I configure a Dell Precision T7500 Workstation.
The workstation will be used as a PC, not as a server. It will be on about 15 hours per day although not in active use all that time.
I plan to purchase the system with one internal hard drive from Dell configured in non-RAID. I plan to add one internal drive on my own rather than paying Dell to do it. One drive will be for OS/applications and one drive will be for data. (The data gets backed up offsite through the day and to an external drive at night, so I am comfortable with no RAID.)
I had been planning Western Digital 10,000 RPM 300 GB Velociraptor drives. Then I noticed that Dell offers either SATA or SAS drive configurations. In the configurator they describe it as "all SATA" or "all SAS." In the T7500 specifications for the hard disk controller they list:
Integrated LSI 1068e SAS/SATA 3.0Gb/s controller supports host based RAID 0 or 1
Optional PERC 6/i PCI-e SAS/SATA hardware RAID card supports RAID 0, 1, 5, 10
The SATA drives Dell offers are 10,000 RPM 3.0 GB/s drives. The SAS drives they offer are 15,000 RPM 3.0 GB/s drives.
Curiously there is no price difference for the same capacity drive in either SAS or SATA.
Which do you think I should choose? Why? Will adding a drive be more or less difficult with SAS compared to SATA?