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Sun Storage 5320 NAS Appliance
 

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StorageTek[TM] 5320 NAS Appliance

There are two FC array RAID storage units that can be used with this NAS appliance today. The first is the CSM1 5300 RAID EU and the second is the CSM2 5320 RAID EU storage for FC environments. These enclosures support two controller modules each.

The Model 2882 (CSM1) and Model 3992 (CSM2)

The second FC storage type unit used with this NAS appliance is called the expansion unit, designated EU-F, and there is a CSM1 and CSM2 version and both attach to the RAID EU.

The CSM1 5300 RAID EU and the CSM1 EU-F both support 14 drives within each of their enclosures. The 5300 RAID EU supports up to seven FC expansion units for a total of 112 FC drives.

The CSM2 5320 RAID EU and the CSM2 EU-F both support 16 drives within each of their enclosures. The 5320 RAID EU supports up to six FC expansion units for a total of 112 FC drives.

Drive faceplates

CSM1/2 - Labeled FC, SATA or Filler (If the CSM1 5300 RAID EU is used in a SATA setup, the drive faceplates are labeled 'FILLER')
CSM2 - Has its Drive LEDs on the faceplate also

The CSM1 5300 RAID EU does not support SATA drives and so when this module is used with a SATA configuration there are no drives installed in the CSM1 RAID EU module. The CSM2 was designed to work with the SATA drives so today when using the CSM2 5320 RAID EU module you can have SATA or FC drives installed. You cannot mix SATA and FC in any CSM1 or 2 module though, it's either all SATA or all FC.

Today we cannot mix the CSM1 5300 RAID EU with CSM2 EU's. We can only attach the matched CSM1 SATA expansion unit with the CSM1 5300 RAID EU for a CSM1 SATA Array configuration. The CSM2 5320 RAID EU can be mixed with CSM2 FC or SATA EUs only.

The following describes the Sun StorageTek 5320 NAS Appliance FC and SATA differences:

Fibre Channel

There are two types of FC drives supported by the CSM1 trays today, 146 gigabyte drives and 300 gigabyte drives both at 10K RPMs. There are currently no limitations with the Fibre Channel back-end with 14 - 146 or 300 gigabyte drives per tray, with two hot spares* in the controller tray. The controller tray, with it's two hot spares is configured with two Volume Groups of RAID5 5+1. The EU-Fs (FC expansion units) with 14 - 146 or 300GB drives, and no hot spares, are configured for two Volume Groups of RAID5 6+1.

The CSM1 setup has two hot spares in the RAID EU only. The CSM2 setup with 300GB Drives has one hot spare per tray.

SATA

Uses a 400 gigabyte drive at 7200 RPMs. Limitations. The maximum size for a LUN (also referred to as a volume group or RAID set) is two terabytes. In the CSM1 the controller tray is diskless, the first EU-S (SATA Expansion Unit) is configured with two hot spares and two Volume Groups of RAID5 5+1 which are then configured for two equal sized Volumes per Volume Group. So you end up with the following, on the first SATA tray, two hot spares two volume groups and on the remaining EU-S trays you end up with two Volume Groups and four Volumes, two per Volume Group and no hot spares

CSM2 Drive LEDs

Service Action Allowed -
Steady blue indicates an action can be taken without adverse effects.
Off means that the drive is engaged and no action is to be taken.

Service Action required -
Steady amber means that the drive requires action.
Off indicates that the drive does not require any action.

OK -
Steady green indicates that the drive has a power supply and is functioning normally.
Off means that the drive does not have a power supply
Flash means that normal activity is in progress.

CSM1 Drive LEDs

Active LED -
Steady green indicates no activity at present.
Flash means that normal activity is in progress
Off indicates that there is some problem.

Fault LED -
Steady Amber led means that the drive is at fault
If all the drive leds are flashing amber, then there is a problem on the tray.

Off - normal status and drive is functioning normally
Flashing - this indicates that the locate function for the drive,volume or storage array has been used.

StorageTek 5220 NAS Appliance

Uses a CSM2 tray. Please refer to the information above for CSM2 tray drive leds. The tray contains SATA drives.

StorageTek 5310/5210 NAS Appliance

Front Panel LEDs

Hard Disk Drive Activity - Colour Green -The Drive Activity LED on the front panel is used to indicate drive activity from the onboard SCSI controller. The server

Main Board also provides a header,giving access to this LED for add-in IDE or SCSI controllers.

Failed drives are usually evident by the following:

• Red light is on the drive.
• LCD panel may display message R11 Drive failure.
• Log will display ?Failed drive at slot #?.
• Diagnostic email will list drive as failed.
• LUN will be reported as degraded in the log and in the diagnostic email.
• Controller alarm may be beeping.

Through the StorEdge Web Administrator, check the drive status.
Navigate to RAID/Manage RAID.
The screen may take several minutes to display, as the NAS appliance must scan the RAID subsystem for configuration data.
This screen displays the drives, RAID sets and LUN configuration.

Functional drives have a green LED displayed beside them. The failed drive will have a red LED. Replace the failed drive.
After a few minutes, the display will change. The replaced drive will display a yellow LED, with status new drive added not configured.
The options Remove Lun, New Lun, Remove HS and Add HS buttons will be grayed out. RMV LUN, ADD LUN, RMV HS and Add HS buttons will be grayed out.

Additional notes applicable for all the NAS Appliances

Using the WEBadmin RAID/Manage RAID menu, verify by selecting individual luns if the configured drives are correct and as displayed.

Sometimes, it has been seen, that a drive may be un-configurable for some reason.
It may display as being a part of a volume which is not existing or configured on the storage.

Either initialize it through NRM or replace such a drive. Contact Sun Support to do so.

If a drive is offline, check if the volume of which it is a part of , has been made offline. This can be found effectively using NRM. Contact Sun Support to do so. It is important to determine the reason for the drive becoming offline to avoid data corruption.
Check the backend storage log to determine the reason for its offline state.
Do not use CAM to administer drives on captive storage.
Captive storage can be identified by the connection of the Expansion units directly to the NAS head without any switches in between.

The Knowledge Work Queue for this article is KNO-STO-NAS.

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