Service Mode
A disk | drive | must | be placed in Service Mode before | it | can be removed from | the | SS | ||||||
loop | and | maintenance | performed on | it. When | Service | Mode | is | set: |
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Ÿ | The |
| Check | light | of the disk drive comes on for identification. |
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Ÿ | All | SSA | loop | activity through the disk drive stops. |
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Ÿ | The |
| disk | drive | motor | stops. |
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Ÿ | The |
| Check | light | (if | present) | of the | enclosure | that | contains the selected | disk | d |
comes on.
Ÿ The SSA loop is broken and no communication to the disk is possible.
Only one disk drive at a time can be in Service Mode.
Before using this service aid, you must make the selected disk drive unavailable t system; otherwise, an error occurs.
SSA | devices | can | be maintained | concurrently; | that | is, they | can be | removed, | installed, | ||||||||||||
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| tested | on | an | SSA | loop | while the other | devices | on | the |
| loop | continue to | work | |||||||
normally. If | a | disk drive has its Check light | on, | you | can |
| remove | that | disk | drive fr | |||||||||||
SSA | loop | without | taking | any | special | actions. |
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If |
| a | disk | drivenot | havdoes its | Check | light on, | the | SSA | loop | that | passes | through | it | |||||||
might | still | be | active, although the disk drive | itself | might | not | be | working. You must | |||||||||||||
that | disk drive into | Service | Mode | before | you | remove | it | from | the |
| SSA | loop. |
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To Set Service Mode with the DOS Configurator
1.Start the DOS Configurator (see “Accessing Service Aids from the DOS Configurator” on page 29) and SSAselectAdapter List .
2. Select | the required | adapter | from the list, then fromDiskthe Adapter Menu select | |
Service | Aids . |
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The | Disk | Service Aids | window is | displayed. |