Dell PowerVault 221S (SCSI) - Manual (Page 36)

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02
PAGE 36 11/17/2005
Table 5-2 – Controller Families & Features: Part 1
PERC 4e/Di PERC 4e/DC
PERC 4/Di
(PE2600)
PERC 4/Di
(PE1750)
SCSI
Technology Wide
Ultra320 Wide
Ultra320 Wide
Ultra320 Wide
Ultra320
Host Bus
Interface
x4 PCI
Express
(Embedded) X8 PCI
Express
(HBA)
PCI 2.2
(Embedded)
32-bit / 33
MHz PCI
(Embedded)
# Channels 2 2 2 2
# internal
connectors 2 x 68-pin
HD 2 x 68-pin
HD 2 x 68-pin
HD
n/a
(hardwired to
backplane)
# External
Connectors 1 x 68-pin
UHD 2 x 68-pin
UHD 1 x 68-pin
HD 1 x 68-pin
UHD
RAID Levels
Supported
0, 1, 5, 10, 50 0, 1, 5, 10, 50 0, 1, 5, 10, 50 0, 1, 5, 10, 50
Cluster
Support?
no yes no no
Cache Size
(DIMM) 256MB
DDR2
128MB DDR
128MB
DIMM 128MB
DDR2
Write Cache
Options
off, write-
through,
write-back off, write-
through,
write-back off, write-
through,
write-back off, write-
through,
write-back
Read Cache
Options
read-ahead
(default),
off
(selectable) read-ahead
(default),
off
(selectable) read-ahead
(default),
off
(selectable) read-ahead
(default),
off
(selectable)
BBU Battery Life 48-72 hours 48-72 hours 48-72 hours 48-72 hours
Max # Logical
Drives/Controller
40 40 40 40
Max # Physical
Drives/Logical
Drive
32 32 32 32
Vendor LSI LSI LSI LSI
SCSI Chip LSI 53C1030 LSI 53C1030 LSI 53C1030 LSI 53C1030
RAID Processor Intel GC80332 Intel GC80332 Intel GC80303 Intel i80321