A storage system with an array of redundant storage devices places bounds
on access request servicing. If a storage device is unable to service the
access request within the bounds, the storage system temporarily,
individually offlines the specific storage device. Access requests
pending for the storage device may be serviced by other storage devices
of the redundant array while the storage device is offline. The offline
storage device can perform error recovery and be brought back online by
the system when error recovery has completed.