Sun Storedge T3+ Array Settings - Sun Microsystems StorEdge 3900 Series Reference And Service Manual

3.3

Sun StorEdge T3+ Array Settings

The supported configurations for the Sun StorEdge T3+ arrays are given in
TABLE 3-7
Element
Hot Spare
Block Size
Cache
Mirror
Multipathing Support
2
(mp_support)
Read Ahead
3
(rd_ahead)
Recon Rate
RAID Type
LUNs/Partner Pair
fc_topology
enable_volslice
1. All Sun StorEdge 3900 series storage subsystems ship from Sun in the default DAS configuration.
2. Multipathing support in SAN configurations must be set to rw.
3. Read ahead (rd_ahead) is typically set to off in random access environments. This delivers better overall cache performance.
4. In this configuration, one LUN per Sun StorEdge T3+ array partner group, two LUNs per array are used by the RAID 1 devices. One
LUN per Sun StorEdge T3+ array partner group, two LUNs per array are used by the RAID 5 devices. The configuration utility assigns
three physical drives to the RAID 1 device and assigns the remaining five physical drives to the RAID 5 device. The ninth physical drive
is always the hot spare.
5. Sun StorEdge T3+ array with 181 Gbyte drives only.
Sun StorEdge T3+ Array Configuration Types
Default DAS Default SAN
1
Configuration Configuration
Yes Yes
16 Kbytes 16 Kbytes
auto auto
auto auto
Sun StorEdge Read/write
Traffic Manager (rw)
(mpxio)
off off
med med
5 5
5
2 or 4 2 or 4
auto auto
off off
Configuration Option 1
Yes
16 Kbytes, 32 Kbytes,
64 Kbytes
auto
auto
Read/write (rw;
DAS/SAN), Sun
StorEdge Traffic
Manager (mpxio)
(DAS only), or none
(DAS only)
off or on
low, med, high
1 or 5
5
2 or 4
auto, loop,
fabric_p2p (DAS
only)
off (DAS/SAN),
on (DAS only)
Chapter 3 Default Configurations and Settings
TABLE 3-7
Configuration Option 2
Yes
16 Kbytes, 32 Kbytes,
64 Kbytes
auto
auto
Read/Write (rw;
DAS/SAN), Sun
StorEdge Traffic
Manager (mpxio)
(DAS only), or none
(DAS only)
off or on
low, med, high
1 and 5
4
4
auto, loop,
fabric_p2p (DAS
only)
off (DAS/SAN),
on (DAS only)
3-9
.