Product Description
Apple Drive Module - 80GB Serial ATA
The Xserve G5 features next generation hot-pluggable Serial ATA Apple Drive Modules with 80GB or 250GB drives, offering up to 750GB of capacity.
The Apple Drive Module (ADM) is a hot-pluggable Serial ATA hard drive in a special drive carrier module designed for easy server upgradeability and maintenance. Apple Drive Modules are available in 80GB or 250GB sizes and operate at 7200 rpm and are equipped with 8MB disk cache.
Using up to three 80GB or 250GB ADMs, the Xserve G5 can be configured from 80 to 750 gigabytes of internal storage. Unpopulated bays ship with a blank drive carrier which can be replaced with a drive module at any time – even if the server is running – so its easy to add storage capacity as your server needs grow.
Each ADM has two LED activity lights – one indicating drive activity and one indicating drive status. All Apple Drive Modules support SMART – Self Monitoring and Reporting Technology – allowing the hardware monitoring tools including with Xserve G5 to monitor the status of each hard drive and report pre-failure warnings before problems occur.
Software and Hardware RAID options
Mac OS X Server includes AppleRAID, providing RAID 0 and 1 support through software, allowing you to increase either data redundancy or performance. Xserve G5 features on-line rebuilding of RAID 1 volumes and is able to boot from RAID volumes. Choose any combination of mirroring or striping across the three drive bays. RAID configurations require a minimum of two ADM hard drives. For higher level of RAID capability, consider the Hardware RAID PCI card CTO option for the lower PCI slot. For higher capacities, consider an Xserve RAID with an Apple Fibre Channel PCI card.
Serial ATA hard drives
Serial ATA hard drives combine low cost with excellent performance. Serial ATA drives features a point-to-point interconnect to that each drive is electrically isolated from the other and multiple drives don’t compete for bandwidth. The drives have 8MB of disk cache, operate at 7,200 revolutions per minute (rpm) and use a protocol that enables faster data transfer to and from the hard drive -- 1.5 gigabytes of data per second.
Apple Drive Module Serial ATA Compatibility
Apple Drive Modules with Serial ATA drives are compatible only with the new Xserve G5. For Xserve RAID or older Xserve (G4 based) products, use the Apple Drive Module with Ultra ATA (parallel) support only.