Chapter 4: Getting Started ● 31
Selecting Disk Drives
When selecting disk drives for your RAID array, ensure that all the disk
drives have the same performance level. You can use different-sized disk
drives in the array, but the array will be limited to the capacity of the
smallest and slowest disk drive.
For more information, refer to the Adaptec Storage Manager User’s
Guide or online Help.
Disk Drives for SAS Controllers
Your SAS controller supports both SAS and SATA disk drives. For cable
information, see page 32.
Disk Drives for SATA Controllers
Your SATA controller supports SATA disk drives only. You need one SATA
cable for each disk drive you are connecting to your SATA controller.
Disk Drives for SCSI Controllers
Your SCSI controller supports Ultra320 SCSI disk drives. It also
supports Ultra2 or higher SCSI disk drives and peripherals, but at
performance levels less than Ultra320. Adaptec does not recommend
using SCSI disk drives or peripherals older than Ultra2.
Note: High-voltage Differential (HVD) disk drives are not supported
and will damage your controller.
If you are mixing single-ended (SE) disk drives with Low-voltage
Differential (LVD) disk drives:
● Ensure proper termination by using a cable (like the one included in
the kit) with a built-in multimode terminator and proper adapters.
● Disable termination on all the SE disk drives.
● Put LVD and SE disk drives on separate channels for the best
performance.
Note: If you mix SE and Ultra320 disk drives on the same channel,
the performance of the Ultra320 disk drives is reduced to SE levels.
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