Hard disk drives

NAS Platform and Unified Storage Series 4000 Hardware Reference

Part Number

The server contains two hard disks, which are configured as a Linux SW RAID 1 pair, and they store server or cluster-related data. These hard disks are not part of the customer-usable data storage that is available to the server.

Hard disks are located behind the bezel on the left side of the chassis.
Note: Failed hard disks are hot-swappable, so a failed hard disk can be replaced without shutting down the server. However, there are serious risks in trying to swap a drive that is not failed. It is strongly recommended to avoid performing disk replacement procedures during busy periods in order to minimise risk of any disruption being caused by the procedure.
Note: Do not attempt to replace or recover a hard disk without the assistance of Hitachi Vantara Customer Support.

Figure. Hard disk drives status and activity status LEDs - model 4040

Figure. Hard disk drives status and activity status LEDs - models 4060, 4080, and 4100

Item Description
1 Disk A status and activity LEDs
2 Disk B status and activity LEDs
Table. O/S disk activity and status LEDs
LEDs Meaning

If this LED is on and blue, the disk is operating normally and no problems have been detected. If the LED is flashing blue, it indicates disk activity. If the LED is on, but not flashing, there is currently no disk activity.


If this LED is on immediately after installing a new O/S disk, it indicates that the RAID configuration for the server is being rebuilt. The LED will turn off after the RAID configuration is restored. The amount of time it takes for the RAID configuration to be rebuilt after a new disk drive is installed depends on the amount of user and system configuration data stored.

If this LED is on during the course of normal operation (not after installing a new O/S disk), either the disk has failed or the server’s RAID configuration has been degraded.