Managing the Disk Drive Channel Status

Use the Manage Disk Drive Channel Status option to manage the status of on your . The ability to effectively manage the disk drive channel status on your storage subsystem lets you diagnose any problems that might exist on a particular disk drive channel.


Important:

Use this option only under the guidance of a representative.

  1. Select one of these tasks, and go to the indicated step:
  2. To view disk drive channel details, perform these substeps:
    1. From the Subsystem Management Window, select Advanced >> Troubleshooting >> Disk Drive Channels .
    2. To view details for a specific disk drive channel, highlight a disk drive channel in the Select disk drive channel area, and select Show Details.
    3. To return to the Disk Drive Channels dialog, click Close. You are finished with this procedure.
  3. To save disk drive channel details, perform these substeps:
    1. From the Subsystem Management Window, select Advanced >> Troubleshooting >> Disk Drive Channels .
    2. In the Select disk drive channel area, highlight a channel, and select Show Details.
    3. Click Save As.
    4. In the File name text box, enter a name for the file to be saved or browse to a previously saved file if you want to overwrite an existing file.
      Use the convention filename.txt for the name of the file. (The suffix .txt is added to the file automatically if you do not specify a suffix for the file.) You might also specify another disk drive and directory if you want to save the file in a location other than the default.
    5. Click Save.
      The disk drive channel details are saved to the location that you selected.
    6. To return to the Disk Drive Channels dialog, click Close. You are finished with this procedure.
  4. To clear disk drive channel-related error counts, select Clear Error Counts to clear the cumulative error counts for all disk drive channels on the storage subsystem.


    Note:

    You might want to retain the cumulative error counts to assist with any future problem diagnosis or troubleshooting.

    1. From the Subsystem Management Window, select Advanced >> Troubleshooting >> Disk Drive Channels .
    2. From the Disk Drive Channels dialog, select Clear Error Counts.
    3. Click Yes.
      The error counts for the selected disk drive channel are reset to 0. You are finished with this procedure.
  5. To set a disk drive channel to Degraded status, use the Set Degraded option to change the status of a selected disk drive channel from to . You can manually degrade a disk drive channel to force all I/Os to use a different disk drive channel.
    1. From the Subsystem Management Window, select Advanced >> Troubleshooting >> Disk Drive Channels .
    2. In the Select disk drive channel area, highlight a disk drive channel with Optimal status, and click Set Degraded.
    3. In the text box, type yes, and click OK.
      The selected disk drive channel status is set to Degraded in the Disk Drive Channels dialog. You are finished with this procedure.
  6. To set a disk drive channel to Optimal status, use the Set Optimal option to change the status of a selected disk drive channel from Degraded status to Optimal status. When a disk drive channel has Degraded status, the only use the disk drive channel for I/Os when no other path is available or when I/Os have failed on all other available paths.
    1. From the Subsystem Management Window, select Advanced >> Troubleshooting >> Disk Drive Channels .
    2. In the Select disk drive channel area, highlight a Degraded disk drive channel, and click Set Optimal.
    3. In the text box, type yes, and click OK.
      The selected disk drive channel status is set to Optimal in the Disk Drive Channels dialog. You are finished with this procedure.
  7. To locate expansion drawers on a disk drive channel, use the Locate option to physically locate and identify all expansion drawers that are attached to a particular disk drive channel. An LED comes on for each expansion drawer in thestorage subsystem.
    1. From the Subsystem Management Window, select Advanced >> Troubleshooting >> Disk Drive Channels .
    2. In the Select disk drive channel area, highlight a disk drive channel, and select Locate.
      The LEDs blink on all the expansion drawers on the selected disk drive channel in the storage subsystem.
    3. When you have located the expansion drawers, click OK.
      The LEDs stop blinking. If any other locate operations (Locate Storage Subsystem, Locate Array, Locate Expansion Drawer, or Locate Disk Drive) are being invoked from another , these LEDs also stop blinking. You are finished with this procedure.


      Note:

      If the LEDs from the Locate Disk Drive Channel operation do not stop blinking, select Storage Subsystem >> Locate >> Stop All Indications to stop the process manually.

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