Compaq Infortrend Manuale Utente

Firmware Functionality Specifications

B-3

Host LUN Geometry
User Configurable Default
Geometry:

1. Capacity <64GB: Head=63, Sector=32, Cylinder=?

(depends on capacity)

2. 64GB<capacity<128GB:Head=64,

Sector=64,

Cylinder=? (depends on capacity)

3. 128GB<capacity<256GB: Head=127, Sector=64,

Cylinder=? (depends on capacity)

4. 256GB<capacity<512GB: Head=127, Sector=127,

Cylinder=?

5. 512GB<capacity<1TB:

Head=255,

Sector=64,

Cylinder=? (depends on capacity)

6. 1TB<capacity: Head=225, Sector=225, Cylinder=?

(depends on capacity)

User Configurable
Geometry range:

Sector: 32, 64, 127, 255 or Variable
Head: 64, 127, 255 or Variable
Cylinder: <1024, <32784,<65536 or Variable

Drive Motor Spin-up

Supported. The controller will send spin-up (start unit)
command to each drive at the 4 sec. intervals.

Drive-side Tag Command
Queue

Supported. User adjustable up to 128 for each drive

Host-side Maximum
Queued I/O count

User adjustable up to 1024

Maximum concurrent Host
LUN connection

User adjustable up to 64

Number of Tags Reserved
for each Host-LUN
connection

User adjustable up to 256

Controller/Logical Drive
Shutdown

Turns controller or specific logical drive into a state that
does not receive I/Os. This function is available
through OEM “iappend” program.

Drive I/O timeout

User adjustable

IO channel diagnostics

Supported

Drive Roaming

Supported

Caching Operation:

Write-back Cache

Supported.

Write-through Cache

Supported.

Supported Memory type

SDRAM memory for enhanced performance
Fast Page Memory with Parity for enhanced data
security

Read-ahead Operation

Intelligent Dynamic read-ahead operation for
sequential data accessing

Multi-Threaded Operation

Yes

Scatter / Gather

Supported

I/O sorting

Supported. Optimized I/O sorting for enhanced
performance

Opt. for Sequential

I/O

Opt. for

Random I/O

Variable Stripe Size

RAID0

128