Dell PowerVault 221S (SCSI) User Manual
Page 38
A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS
VER A02
PAGE 38
11/17/2005
Table
5-2 – Controller Families and Features: Part 3
PERC 3/DC
PERC 3/QC
PERC 3/Di
PERC 2/QC
Adaptec
39160
SCSI Technology
Wide Ultra3 /
U160
Wide Ultra3 /
U160
Wide Ultra3 /
U160
Wide Ultra 2
Wide
Ultra3 /
U160
Host Bus Interface
64-bit / 66
MHz PCI 2.2
(HBA)
64-bit / 66
MHz PCI 2.2
(HBA)
64-bit / 66
MHz PCI 2.2
(Embedded)
64-bit / 33
MHz PCI 2.1
(HBA)
64-bit / 66
MHz PCI
2.2 (HBA)
# Channels
2 4 2 4 2
# internal
connectors
2 x 68-pin
HD
2 x 68-pin
HD
2 x 68-pin HD
(except 1650
& 2650 -
N/A)
2 x 68-pin
HD
2 x 68-pin
HD
(LVD); 1x
50-pin
Ultra
# External
Connectors
2 x 68-pin
UHD
4 x 68-pin
UHD
0, 1 or 2 x 68-
pin HD
(server
platform
dependant)
4 x 68-pin
UHD
2 x 68-pin
UHD
(LVD)
RAID Levels
Supported
0, 1, 5, 10, 50
0, 1, 5, 10, 50
0, 1, 5, 10
0, 1, 5, 10
n/a
Cluster Support?
yes no no no no
Cache Size
64 or 128MB
DIMM
64 or 128MB
DIMM
128MB DIMM
16 - 128 MB
DIMM
n/a
Write Cache
Options
off, write-
through,
write-back
off, write-
through,
write-back
off, write-
through,
write-back
off, write-
through,
write-back
n/a
Read Cache
Options
read-ahead
(default),
off
(selectable)
read-ahead
(default),
off
(selectable)
read-ahead
(default),
off
(selectable)
read-ahead
(default),
off
(selectable)
n/a
BBU Battery Life
48-72 hours
48-72 hours
48-72 hours
48-72 hours
n/a
Max # Logical
Drives/Controller
40 40 64 64 n/a
Max # Physical
Drives/Logical
Drive
32 32 64 64 n/a
Vendor
LSI (AMI)
LSI (AMI)
Adaptec Adaptec Adaptec
SCSI Chip
Qlogic 12160
2 X Qlogic
12160
Adaptec 7899
2 x Adaptec
7897N
Adaptec
7899
RAID Processor
Intel i960
Intel i960
Intel i960 OR
GC80303
(server
platform
dependant)
StrongARM
SA110S
n/a (non-
RAID)