Dell EqualLogic PS4110 Hardware Owner's Manual

Also see for PS4110: Hardware Overview Installation User guide

Dell EqualLogic PS4110 Hardware Owner's Manual Manual pdf 13 page image

Hardware Owner's Manual 2 Maintaining DrivesArray Behavior When a Drive FailsHow an array handles a drive failure depends on whether a spare drive is available and whether the RAID setcontaining the failed drive is degraded.For example:• If a spare drive is available, the array automatically uses it to replace the failed drive. Performance is nor-mal after reconstruction completes.• If a spare drive is not available the RAID set will become degraded (except a RAID 6 set). Performancemay be impaired. A RAID 6 set can survive two simultaneous drive failures.• If a spare drive is not available and the failed drive is in a RAID set that is already degraded, data may belost and must be recovered from a backup.• If a drive fails, replace it. Do not re-install it in the array.Drive Handling RequirementsHandle drives as follows:• Store drives properly. Store replacement drives in the packaging in which they were shipped. Do not stackdrives or place anything on top of a drive.• Protect drives from electrostatic discharge. Wear an electrostatic wrist strap when handling a drive,unless it is protected from electrostatic discharge. See "Protecting Hardware " on page 2.• Handle drives carefully. Hold a drive only by the plastic part of the carrier or the handle. Do not drop orjolt a drive or force a drive into a slot.• Warm replacement drives to room temperature before installation. For example, let a drive sit over-night before installing it in an array.• Do not leave drive slots empty. Each drive slot in an array must contain a drive assembly or a blank car-rier. Operating an array with an empty slot will void your warranty and support contract.• Do not remove a functioning drive (other than a spare) from an array. If the drive is not a spare, theRAID set may become degraded. If you remove a spare, replace the drive as soon as possible.• Do not remove a drive from its carrier. This action will void your warranty and support contract.• Keep the shipping material. Return a failed drive to your array support provider in the packaging in whichthe replacement drive was shipped. Shipping drives in unauthorized packaging may void your warranty.9