Dell Equallogic PS4110X PS4110 Hardware Owners Manual - Page 13

Array Behavior When a Drive Fails, Drive Handling Requirements

Get Dell Equallogic PS4110X PDF manuals and user guides View all Dell Equallogic PS4110X manuals
Add to My Manuals
Save this manual to your list of manuals

Page 13 highlights

Hardware Owner's Manual 2 Maintaining Drives Array Behavior When a Drive Fails How an array handles a drive failure depends on whether a spare drive is available and whether the RAID set containing 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). Performance may 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 be lost and must be recovered from a backup. • If a drive fails, replace it. Do not re-install it in the array. Drive Handling Requirements Handle drives as follows: • Store drives properly. Store replacement drives in the packaging in which they were shipped. Do not stack drives 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 or jolt 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, the RAID 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 which the replacement drive was shipped. Shipping drives in unauthorized packaging may void your warranty. 9

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
Hardware Owner's Manual
2 Maintaining Drives
Array Behavior When a Drive Fails
How an array handles a drive failure depends on whether a spare drive is available and whether the RAID set
containing 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). Performance
may 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 be
lost and must be recovered from a backup.
•
If a drive fails, replace it. Do not re-install it in the array.
Drive Handling Requirements
Handle drives as follows:
•
Store drives properly.
Store replacement drives in the packaging in which they were shipped. Do not stack
drives 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 or
jolt 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, the
RAID 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 which
the replacement drive was shipped. Shipping drives in unauthorized packaging may void your warranty.
9