EMC CX500I Configuration Guide - Page 107

Disk Configuration Rules and Recommendations

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Planning File Systems and LUNs Part of a sample LUN and Storage Group worksheet for one cabinet follows. 100 101 102 103 104 105 106 107 108 109 1010 1011 1012 1013 1014 000 001 002 003 004 005 006 007 008 009 0010 0011 0012 0013 0014 spare lun 3,R1 lun 4,R1lun 5,R5 lun 6,R5 Vault disks lun 0,R5 lun 1,R5 lun 2,R5 Storage-system number or name:_____SS1__________ Storage Group ID or name:__0___ Server hostname:_____Server1________ Dedicated Shared LUN ID or name___0___RAID type _5_ Cap. (Gb) _292_ Disk IDs___000, 001, 002, 003, 004 LUN ID or name___1___RAID type _5_ Cap. (Gb) _292_ Disk IDs___005, 006, 007, 008, 009 LUN ID or name___2___RAID type _5_ Cap. (Gb) _292_ Disk IDs___0010, 0011, 0012, 0013, 0015________ LUN ID or name___3___RAID type _1_ Cap. (Gb) __73_ Disk IDs___101, 102 Storage Group ID or name:__0___ Server hostname:_____Server1________ Dedicated Shared LUN ID or name___4___RAID type _1_ Cap. (Gb) __73_ Disk IDs____103,104 LUN ID or name___5___RAID type _5_ Cap. (Gb) _292_ Disk IDs_____105, 106, 107, 108, 109___________ LUN ID or name___6___RAID type ___ Cap. (Gb) _292_ Disk IDs____1010, 1011, 1012, 1013, 1014_______ LUN ID or name_______RAID type ___ Cap. (Gb) _____ Disk IDs Disk Configuration Rules and Recommendations The following rules and recommendations apply to CX300, CX500, CX500i, and CX700 systems: ◆ You cannot use any of the disks 000 through 004 (enclosure 0, loop 0, disks 0-4) as a hot spare in a CX-Series system. ◆ The hardware reserves several gigabytes on each of disks 000 through 004 for the cache vault and internal tables. To conserve disk space, you should avoid binding any other disk into a RAID Group that includes any of these disks. Any disk you include in a RAID Group with a cache disk 000-004 is bound to match the lower unreserved capacity, resulting in lost storage of several gigabytes per disk. ◆ Each disk in the RAID Group should have the same capacity. All disks in a Group are bound to match the smallest capacity disk, and you could waste disk space. The first five drives (000-004) should always be the same size. Planning Applications, LUNs, and Storage Groups 5-13

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Planning Applications, LUNs, and Storage Groups
5-13
Planning File Systems and LUNs
Part of a sample LUN and Storage Group worksheet for one cabinet
follows.
Disk Configuration Rules and Recommendations
The following rules and recommendations apply to CX300, CX500,
CX500i, and CX700 systems:
◆
You cannot use any of the disks 000 through 004
(enclosure 0,
loop 0, disks 0-4) as a hot spare in a CX-Series system.
◆
The hardware reserves several gigabytes on each of disks 000
through 004 for the cache vault and internal tables. To conserve
disk space, you should avoid binding any other disk into a RAID
Group that includes any of these disks. Any disk you include in a
RAID Group with a cache disk 000-004 is bound to match the
lower unreserved capacity, resulting in lost storage of several
gigabytes per disk.
◆
Each disk in the RAID Group should have the same capacity. All
disks in a Group are bound to match the smallest capacity disk,
and you could waste disk space. The first five drives (000-004)
should always be the same size.
Storage Group ID or name:__
0
___ Server hostname:_____
Server1
________ Dedicated
Shared
LUN ID or name___
0
___RAID type _
5
_ Cap. (Gb) _
292
_
Disk IDs___
000, 001, 002, 003, 004
_____________
LUN ID or name___
1
___RAID type _
5
_ Cap. (Gb) _
292
_
Disk IDs___
005, 006, 007, 008, 009
_____________
LUN ID or name___
2
___RAID type _
5
_ Cap. (Gb) _
292
_
Disk IDs___
0010, 0011, 0012, 0013, 0015_
_______
LUN ID or name___
3
___RAID type _
1
_ Cap. (Gb) __
73
_
Disk IDs___
101, 102
______________________________
Storage-system number or name:_____
SS1
__________
Storage Group ID or name:__
0
___ Server hostname:_____
Server1
________ Dedicated
Shared
LUN ID or name___
4
___RAID type _
1
_ Cap. (Gb) __
73
_
Disk IDs____
103,104
_____________________________
LUN ID or name___
5
___RAID type _
5
_ Cap. (Gb) _
292
_
Disk IDs_____
105, 106, 107, 108, 109
___________
LUN ID or name___
6
___RAID type ___ Cap. (Gb) _
292
_
Disk IDs____1
010, 1011, 1012, 1013, 1014
_______
LUN ID or name_______RAID type ___ Cap. (Gb) _____
Disk IDs_________________________________________
000
001
002
003
004
005
006
007
008
009
0010
0011
00
12
0013
0014
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
10
14
spare
lun 3,R1
lun 4,R1
lun 5,R5
lun 0,R5
lun 1,R5
lun 2,R5
lun 6,R5
Vault disks