Symptoms

You may observe one or more of the following alerts or event codes indicating disk issues: Event Codes: STORAGE-00001, STORAGE-00002, PHYM-00001Alert Messages: Enclosure disk has failed and should be replacedDisk has a hardware fault and may need to be replacedDisk is absent and should be replacedUnable to access the disk; disk state is powered offA disk has failed, and the enclosure slot has been disabled Affected Products: All Data Domain systemsAll Data Domain Operating System (DDOS) software releases

Cause

DDOS continuously monitors disk health and automatically fails a drive when critical I/O errors occur. Alerts are generated when a disk is: Removed (absent)Dead or failedPowered off (manually or automatically by DDOS to prevent backend issues)

Resolution

Verify and confirm the failure: Verify the alerts on the system using DDMC, Data Domain System Manager (DDSM) Web UI, or DD-CLI (SSH). DD-CLI # alerts show currentDDSM > Alerts Identify and confirm the current state of all drives in the system. DD-CLI # disk show state | AND | # disk show hardwareDDSM > Hardware > Storage > Disks Single failed disks should be replaced immediately. Contact your support provider and raise a service request (SR) if an SR has not been raised automatically. If multiple disk drive alerts exist, contact your contracted support provider for assistance with the next steps. Example: DD-CLI: sysadmin@DD# disk show state Enclosure Disk 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 --------- ---------------------------------------------- 1 . . . 2 . . . . . . . . . . . . . . s 3 . . . . . . . . . . . . . . s 4 . . . . . . . . . . . . . . s 5 . . . . . F . . . . . . . . R 6 . . . . . . . . . . . . . . s --------- ---------------------------------------------- Here notice that disk 5.6 (F)ailed - (R)econstructing to Spare disk 5.15 Absent disks are marked as (A)Powered-off disks are marked as (P) For DD3300 disk issues, consider this article Data Domain: DD3300 Mapping disk alerts to the correct hard drive slot Replace the failed disk: See relevant documented disk replacement procedures (Data Domain Documentation Tip: Best practice for replacing disk drives should include a one minute waiting period from the time a drive is removed until the new drive is inserted.For example, remove the failed disk, wait one minute and then insert the new disk.This allows the controller firmware to properly remove the old drive before the new drive is inserted, greatly reducing the possibility of a hotplug issue where the new drive is not properly recognized. Verify that the drive is in a SPARE state after replacement. From DD-CLI # disk show stateDDSM > Hardware > Storage > Disks Example: DD-CLI: sysadmin@DD# disk show state Enclosure Disk 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 --------- ---------------------------------------------- 1 . . . 2 . . . . . . . . . . . . . . s 3 . . . . . . . . . . . . . . s 4 . . . . . . . . . . . . . . s 5 . . . . . s . . . . . . . . . 6 . . . . . . . . . . . . . . s --------- ---------------------------------------------- The newly installed disk becomes (S)pare and the reconstructed disk is now 'in-use'. If the new drive reports as Unknown: Attempt a rescan of the drives. Run command # disk rescanVerify status of drive from DD-CLI # disk show stateClear the alert for unknown drive from DD-CLI # alerts clear alert-id <alert-id> If the new drive reports as failed after a drive replacement: Attempt to rescan the drive by rescanning one or more drives. Run command # disk rescanVerify status of drive from DD-CLI # disk show stateIf the drive is still shown as (F)ailed, run this command from DD-CLI: # disk unfail <encl.disc> For example: # disk unfail 5.6 Clearing the drive alert after drive replacement: Clear the alert for the unknown drive from DD-CLI # alerts clear alert-id <alert-id> PowerProtect DD - Replacing Cache Tier Disk on DD6900/DD9400 Duration: 00:02:09 (hh:mm:ss)Closed captions: None available PowerProtect DD - Replacing Cache Tier Disk on DD9900 Duration: 00:02:13 (hh:mm:ss)Closed captions: None available Reference: Data Domain: How to Identify and Resolve Disk StatesData Domain - How to Check Alerts on a Data Domain SystemReplacement Procedures: Data Domain Documentation

Support Cases