Compaq Infortrend Manuale Utente
Infortrend
B-4
RAID1
128
32
RAID3
16
4
RAID5
128
32
Caching Optimization
•
Cache buffer sorting prior to cache flush operation
•
Gathering of writes during flush operation to minimize the number of IOs
required for parity update
required for parity update
•
Elevator sorting and gathering of drive IOs
•
Multiple concurrent drive IOs (tagged commands)
•
Intelligent, predictive multi-threaded read-ahead
•
Multiple, concurrent host IO threads (host command queuing)
RAID Expansion:
On-line RAID Expansion
Supported.
Mode-1 RAID Expansion-
add Drive
add Drive
Supported. Multiple drives can be added concurrently.
Mode-2 RAID Expansion –
Copy and Replace drives
Copy and Replace drives
Supported. Replace members with drives of larger
capacity.
capacity.
Expand Capacity with no
extra drive bays required
extra drive bays required
Supported in Mode 2 RAID expansion. Provide “Copy
and Replace Drive” function to replace drives with
drives of greater capacity. No need to add another
enclosure for the extra drives.
and Replace Drive” function to replace drives with
drives of greater capacity. No need to add another
enclosure for the extra drives.
Operating system support
for RAID Expansion
for RAID Expansion
No. No operating system driver required. No software
has to be installed for this purpose.
has to be installed for this purpose.