Sas raid controller array limitations – Avago Technologies MegaRAID SAS 8204ELP User Manual
Page 27
Summary of SAS RAID Controller Characteristics
1-11
Copyright © 2005-2007 by LSI Logic Corporation. All rights reserved.
* Assumes one SEP (Storage Enclosure Processor) per enclosure.
** Depends on the number of channels on the system board. The
maximum is two.
Note:
The maximum number of hot spares for each array is equal
to the maximum number of drives for each array.
These RAID controllers support 64-bit logical block addressing (LBA),
which makes it possible to connect a large number of drives to the RAID
controller, directly and through expanders. However, the actual number
of drives that you can attach depends on the SAS RAID array controller
limits rather than on the actual RAID volume capacity. These limits are
listed in
Table 1.1
SAS RAID Controller Array Limitations
Maximum
Virtual
Disks per
Controller
Maximum
Arrays per
Controller
Maximum
Virtual
Disks per
Array
Maximum
Drives per
Array
Maximum
Drives per
Controller
Maximum
Hot
Spares
Maximum
Spans per
Virtual
Disk
Maximum
Enclosures
per Port*
Maximum
Ports
SAS
8208
ELP
8
8
8
8
8
8
4
3
2
SAS
8208
XLP
8
8
8
8
8
8
4
3
2
SAS
8300
XLP
64
128
16
8
8
8
4
3
2**
SAS
8304
ELP
64
128
16
8
8
8
4
3
1
SAS
8308
ELP
64
128
16
16
16
16
8
3
2
SAS
8344
ELP
64
128
16
32
122
122
8
7
2
SAS
84016
ELP
64
128
16
32
122
122
8
3
4
SAS
8408
E
64
128
16
32
32
32
8
3
2
SAS
8480
E
64
128
16
32
122
122
8
3
2
- MegaRAID SAS 8204ELP (Channel) MegaRAID SAS 8204XLP MegaRAID SAS 8204XLP (Channel) MegaRAID SAS 8208ELP MegaRAID SAS 8208ELP (Channel) MegaRAID SAS 8208XLP MegaRAID SAS 8208XLP (Channel) MegaRAID SAS 8300XLP MegaRAID SAS 8308ELP MegaRAID SAS 8344ELP MegaRAID SAS 84016E MegaRAID SAS 84016E (Channel) MegaRAID SAS 8408E MegaRAID SAS 8480E MegaRAID SAS 8704ELP (Channel) MegaRAID SAS 8704EM2 MegaRAID SAS 8704EM2 (Channel) MegaRAID SAS 8708ELP (Channel) MegaRAID SAS 8708EM2 MegaRAID SAS 8708EM2 (Channel)