3Ware 8006-2LP User Guide - Page 42

RAID 10 arrays require a minimum of four, drives., RAID 5 arrays, require a minimum of three drives.

Get 3Ware 8006-2LP - Escalade RAID Controller PDF manuals and user guides
UPC - 000060227379
View all 3Ware 8006-2LP manuals
Add to My Manuals
Save this manual to your list of manuals

Page 42 highlights

3ware Disk Array Configuration Utility ■ RAID 10: combines mirroring and striping, providing both fault tolerance and high performance. RAID 10 arrays require a minimum of four drives. Configurations consist of 4, 6, 8, 10 or 12 drives. ■ RAID 5: combines parity data and striping, providing fault tolerance, high capacity and high storage efficiency. The parity data is distributed across all drives, rather than being concentrated on a single disk. RAID 5 arrays require a minimum of three drives. Configurations consist of at least 3 drives and up to 12 drives. 3ware Disk Array Configuration Available Drives: Port 0 - QUANTUM FIREBALLP KX27.3 512 M Disk Arrays: Array Unit 1 - 3 drive 64K RAID 5 Port 1 - IBM-DTLA-387815 Port 2 - IBM-DTLAI-n3i8t78R1A5ID5 Array Unit Port 3 - IBM-DTLA-387815 1.0GB 512 M 5112 M 512 M Percentage done : 25% Create Array Delete Array Maintain Array Rebuild Array Alt-F1 Help Previous/Next $ Toggle Hot Spare EnterSelect/Deselect F6 Restore Initial Values Esc Cancel F8 Done Figure 15. BIOS Initialization Screen for RAID 5 Select striping size For a RAID 0 or RAID 10 configuration select the striping size. Sizes of 64K, 128K, 256K, 512K or 1M are selected using the Stripe Size box shown in Figure 13. RAID 5 only allows a 64K stripe size. RAID 1 does not allow the user to select the striping size. The default stripe size of 64KB will give the best performance with applications that have many sequential reads and writes. A larger stripe size will give better performance with applications that have a lot of random reads and writes. In general, the smaller the stripe size, the better the sequential I/O and the worse the random I/O. The larger the stripe size, the worse the sequential I/O and the better the random I/O. Select write cache properties The Escalade ATA RAID Controller gives you a choice of disabling the write cache for your disk arrays. Write cache is used to store data locally on the drive before it is written to the disk, allowing the computer to continue with its next task. Enabling the write cache results in the most efficient access times for your computer system. There may be instances when you always 34 3ware Escalade ATA RAID Controller User Guide

  • 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
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
3ware Disk Array Configuration Utility
34
3ware Escalade ATA RAID Controller User Guide
■
RAID 10: combines mirroring and striping, providing both fault tolerance
and high performance.
RAID 10 arrays require a minimum of four
drives.
Configurations consist of 4, 6, 8, 10 or 12 drives.
■
RAID 5: combines parity data and striping, providing fault tolerance, high
capacity and high storage efficiency. The parity data is distributed across
all drives, rather than being concentrated on a single disk.
RAID 5 arrays
require a minimum of three drives.
Configurations consist of at least 3
drives and up to 12 drives.
Figure 15.
BIOS Initialization Screen for RAID 5
Select
striping
size
For a RAID 0 or RAID 10 configuration select the striping size. Sizes of 64K,
128K, 256K, 512K or 1M are selected using the
Stripe Size
box shown in
Figure 13. RAID 5 only allows a 64K stripe size. RAID 1 does not allow the
user to select the striping size.
The default stripe size of 64KB will give the best performance with applica-
tions that have many sequential reads and writes. A larger stripe size will give
better performance with applications that have a lot of random reads and
writes. In general, the smaller the stripe size, the better the sequential I/O and
the worse the random I/O. The larger the stripe size, the worse the sequential
I/O and the better the random I/O.
Select
write
cache properties
The Escalade ATA RAID Controller gives you a choice of disabling the write
cache for your disk arrays. Write cache is used to store data locally on the
drive before it is written to the disk, allowing the computer to continue with
its next task. Enabling the write cache results in the most efficient access
times for your computer system. There may be instances when you always
Restore Initial Values
Previous/Next
Toggle Hot Spare
Cancel
Select/Deselect
Done
Alt-F1
F6
Enter
F8
$
Esc
Help
3ware Disk Array Configuration
Create Array
Delete Array
Maintain Array
Rebuild Array
Available Drives:
Port 0 - QUANTUM FIREBALLP KX27.3
512 M
Disk Arrays:
Array Unit 1 - 3 drive
64K RAID 5
1.0GB
Port 1 - IBM-DTLA-387815
Port 2 - IBM-DTLA-387815
Port 3 - IBM-DTLA-387815
Init RAID5 Array Unit
1
Percentage done :
25
%