![HighPoint RocketRAID 4520 User Manual Download Page 67](http://html1.mh-extra.com/html/highpoint/rocketraid-4520/rocketraid-4520_user-manual_2130680067.webp)
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Model
– Model number of the physical drive
Capacity
– Total capacity of the physical drive
Revision
– HDD device firmware revision number
Read Ahead*
- (Enable/Disable) Disk read ahead
Location
– Device location (example: 1/2 states controller 1, slot 2)
Write Cache*
– (Enable/Disable) the disk write cache
Max Free
– space on disk that is not configured in an array
Status
– (Normal, disabled, critical) status of the disk
NCQ*
– (Enable/Disable) Native Command Queuing (SATA disks only)
Serial Number
– serial number of the physical disk
Identify LED*
– On/Off – toggle the IDENTIFY (RED) on the front panel
Unplug
– Safely ejects selected disk. Other methods of disk removal will trigger
alarm if enabled
*
Disk properties that can be adjusted.
Read Ahead
Enabling disk read ahead will speed up read operations by pre-fetching data and
loading it into RAM.
Write Cache
Enabling write cache will speed up write operations.
NCQ (Native Command Queuing)
A setting that allows SATA disks to queue up and reorder I/O commands for
maximum efficiency.
Identify LED
The Disk tray LED lights on the front panel can be toggled ON or OFF.
Rescan
Clicking rescan will immediately signal the controller to scan for any changes in the
connection. Clicking this button will also stop any alarm if currently ringing.