Home > Storage > PowerScale (Isilon) > Product Documentation > Storage (general) > Dell PowerScale: Considerations and Best Practices for Large Clusters > SmartFailed and stalled drives
SmartFailed disks appear in a similar fashion to other drive-specific states, and therefore include both an array ID and a drive ID. For example:
{ 1:0-11, 2:0-3,5-12, 3-4:0-11, 5:0-1,3-11, 6:0-11, soft_failed: 5:2 }
This shows drive 2 in node 5 to be SmartFailed but still available. If the drive was physically unavailable or damaged beyond communication with the node, the group would be presented as:
{ 1:0-11, 2:0-3,5-12, 3-4:0-11, 5:0-1,3-11, 6:0-11, down: 5:2, soft_failed: 5:2 }
Stalled drives (drives that do not respond) are shown similarly to down drives, for example:
{ 1:0-2,4-11, 2-4:0-11, stalled: 1:3 }
When a drive is ‘un-stalled’, it simply returns to the group.
Many stalled drive messages may indicate a performance issue.