Technical Specifications
This section describes the technical specifications of RAID controller cards.
Table 2-1 describes the basic parameters of RAID controller cards.
Parameter |
LSI SAS2208 |
LSI SAS2308 |
LSI SAS3008IR |
LSI SAS3008IT |
LSI SAS3108 |
Intel SoftRAID |
PM8060 |
PM8068 |
|---|---|---|---|---|---|---|---|---|
Port rate (Gbit/s) |
6 |
6 |
12 |
12 |
12 |
6 (Only SATA drives are supported.) |
12 |
12 |
Number of supported RAID arrays |
64 |
2 |
2 |
N/A |
64 |
8 |
64 |
64 |
Maximum number of hard drives per RAID array |
16 or 32 (Note 2) |
10 |
10 |
N/A |
32 or 240 (Note 1) |
6 |
128 |
128 |
Maximum number of hard drives in all RAID arrays (Note 4) |
16 or 32 (Note 2) |
14 |
14 |
N/A |
32 or 240 (Note 1) |
6 |
240 |
240 |
Support for transparent transmission |
No |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Number of hard drives supported by transparent transmission |
N/A |
1000 |
1000 |
1000 |
32 or 240 (Note 1) |
N/A |
240 |
240 |
Maximum number of hard drives supported |
16 or 32 (Note 2) |
1000 |
1000 |
1000 |
32 or 240 (Note 1) |
6 |
240 |
240 |
Support for CacheCade |
No |
No |
No |
No |
Yes |
No |
No |
No |
Cache read/write ratio adjustable |
N/A |
N/A |
N/A |
N/A |
No |
N/A |
NA |
NA |
Maximum number of SSDs supported by CacheCade |
N/A |
N/A |
N/A |
N/A |
32 |
N/A |
NA |
NA |
Maximum CacheCade capacity |
N/A |
N/A |
N/A |
N/A |
512 GB |
N/A |
NA |
NA |
RAID levels supported by CacheCade |
N/A |
N/A |
N/A |
N/A |
RAID 0/1 |
N/A |
NA |
NA |
Hot sparing supported by CacheCade |
N/A |
N/A |
N/A |
N/A |
Yes |
N/A |
NA |
NA |
Support for FastPath |
Yes (only 107 or later versions) |
No |
Yes |
Yes |
Yes |
No |
No |
No |
Support for 4K drives |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
RAID levels supported |
RAID 0/1/10/5/50/6/60 |
RAID 0/1/10/1E |
RAID 0/1/10/1E |
N/A |
RAID 0/1/10/5/50/6/60 |
RAID 0/1/10/5 (RAID 5 is supported only with a license.) |
0/1/10/5/50/6/60 |
0/1/10/5 |
Support for strip size configuration |
Yes (8 KB, 16 KB, 32 KB, 64 KB, 128 KB, 256 KB, 512 KB, and 1024 KB) |
No (64 KB by default) |
No (64 KB by default) |
N/A |
Yes (64 KB, 128 KB, 256 KB, 512 KB, and 1024 KB) |
No (64 KB by default) |
Yes (64 KB, 128 KB, 256 KB, 512 KB, and 1024 KB) |
Yes (8 KB, 16 KB, 32 KB, 64 KB, 128 KB, 256 KB, 512 KB, and 1024 KB) |
Support for power failure protection by iBBU |
Yes (Cache protection time is 24 hours by default and varies the battery working mode.) |
No |
No |
No |
No |
No |
No |
No |
Support for power failure protection by supercapacitor |
Yes |
No |
No |
No |
Yes |
No |
Yes |
No |
Support for global hot spare |
Yes |
Yes |
Yes |
N/A |
Yes |
Yes |
Yes |
Yes |
Support for dedicated hot spare |
Yes |
No |
No |
N/A |
Yes |
Yes |
Yes |
Yes |
Support for emergency spares |
Yes |
No |
No |
N/A |
Yes |
NA |
NA |
NA |
Number of supported hot spare drives |
16 or 32 (Note 2) |
2 |
2 |
N/A |
32 or 240 (Note 1) |
6 |
2 |
2 |
Support for online RAID level migration |
Yes |
No |
No |
No |
Yes |
No |
Yes |
Yes |
Support for online capacity expansion |
Yes |
No |
No |
No |
Yes |
No |
Yes |
Yes |
Support for automatic SMART scan |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Support for Patrol Read |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Support for consistency check |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Support for crypto encryption |
No |
No |
No |
No |
No |
No |
No |
No |
Support for out-of-band management |
No |
No |
No |
Yes |
Yes (Note 3) |
No |
No |
Yes |
Support for cache |
Yes |
No |
No |
N/A |
Yes (1G/2G/4G) |
No |
No |
No |
Note 1: The LSI SAS3108 supports two types of RAID keys, which support 32 and 240 hard drives respectively. For details, see Table 2-2 in 8.2.1 . Note 2: The LSI SAS2208 supports two types of RAID keys, which support 16 and 32 hard drives respectively. For details, see Table 2-2 in 5.2.1 . Note 3: The LSI SAS3108 PCB version .B and later support out-of-band management. The LSI SAS3108 PCB version .A does not support out-of-band management. Note 4: Maximum number of hard drives in all RAID arrays (for an LSI SAS2308 or LSI SAS3008 RAID controller card) = Number of hot spare drives + Number of drives in RAID arrays Maximum number of hard drives in all RAID arrays (for other RAID controller cards) = Number of hot spare drives + Number of idle drives (drives in Unconfigured Good state) + Number of hard drives in RAID arrays |
||||||||
The "N/A" in the table stands for not applicable.
Table 2-2 lists the reliability, read/write performance, and hard drive utilization of RAID levels supported by RAID controller cards.
RAID Level |
Reliability |
Read Performance |
Write Performance |
Hard Drive Utilization |
|---|---|---|---|---|
RAID 0 |
Low |
High |
High |
100% |
RAID 1 |
High |
High |
Medium |
50% |
RAID 5 |
Medium |
High |
Medium |
(N – 1)/N |
RAID 6 |
Medium |
High |
Medium |
(N – 2)/N |
RAID 10 |
High |
High |
Medium |
50% |
RAID 1E |
High |
Medium |
Medium |
50% |
RAID 50 |
High |
High |
Better than medium |
(N – M)/N |
RAID 60 |
High |
High |
Better than medium |
(N – M x 2)/N |
Note: N indicates the number of member hard drives in a RAID array. M indicates the number of spans of a RAID array. |
||||
Table 2-3 lists the interface types of hard drives supported by each RAID controller card.
Interface Type |
SAS HDD |
SATA HDD |
SAS SSD |
SATA SSD |
NVMe PCIe SSD |
M.2 SSD |
|---|---|---|---|---|---|---|
LSI SAS2208 |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
LSI SAS2308 |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
LSI SAS3008IR |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
LSI SAS3008IT |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
LSI SAS3108 |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
LSI Softraid |
Not supported |
Supported |
Not supported |
Supported |
Not supported |
Not supported |
PM8060 |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
PM8068 |
Supported |
Supported |
Supported |
Supported |
Not supported |
Not supported |
For details about the hard drive models supported by each RAID controller card, see the compatibility list in Intelligent Computing Compatibility Checker.
Previous
