Sun StorageTek T10000 Tape Drive
 

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In this Document

Symptoms

Cause

Solution

References

Applies to:

Symptoms

 5802 errors on consecutive mounts.

Cause

Broken tape drive leader inside of the tape drive.

FSC Dictionary Description:
MODEL = T10000D
FSC = 5802
(FSC Match Found in Rev. 4.12)

FSC: 5802 SRV_FSC_TAPE_LEADERS_MISBUCKLED

MIM Code: NONE

FRU: MEDIA CONF: 50%

FRU: HARDWARE CONF: 50%

Summary: |MEDIA LEADER |DRIVE LEADER |TAPE BUCKLER |

Field Text:
During the load operation the tape leaders failed to buckle. Cartridge must be unloaded before any load recovery action can be attempted. Once the cartridge is extracted from the drive, the drive will automatically recover its buckler position. User should inspect the condition of the cartridge tape leader for integrity before attempting to re-load.

Solution

If you are seeing solid 5802 errors on consecutive mounts then the leader in the drive is broken and the drive needs to be replaced. You may see these interspersed with elevator errors as well. There will be no unload record (367C) for any of these mounts in the event log.

T10000A/B/C/D FSC 5802 Have the customer eject the failing volser(s) and check them to verify that the leader is properly seated in the cartridge and verify that the leader loop (in the cartridge) is not split. This is most likely a leader that has become un-seated. This FSC can be associated with FSC 5135. See KB 1440186.1 for repair instructions if the leader is un-seated. (Note - a chuck tool is needed for this repair) This can happen if tapes go offsite and receive rough handling. If cartridge carriers that have no shock absorption are used it can aggravate the problem of offsite storage and rough handling. Technical Description: The 5802 "misbuckle" happens when the buckler is "buckling" (moving toward the rear of the drive) attempting to buckle the leaders. If the leaders don't buckle, the takeup leader follows the hook as it travels rearward and stays on the hook. At that point, the elevator raises to allow the cart to be removed. Then a misbuckle recovery is needed (remove the cart and an unload is commanded) where servo lowers the elevator and returns the buckler to the home (forward) position, relying on the buckler spring tension. If the leader is pulled into the drive it can hang up on some internal feature and appear to succeed unslacking -- then the buckling attempt is made and it can result in a 5802. OR the cart leader loop (where we buckle) can be split and the takeup leader can slip through, leading to a 5802.

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