Network Appliance DiskShelf 14mk2 FC, Hardware And Service Manual

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Chapter 3: Replacing Disk Shelf Devices 55
Replacing an LRC/ESH/ESH2/ESH4 module
Hot-swapping a module
Assumptions about
this procedure The assumptions about this procedure are that you are replacing either one or
both modules of a single disk shelf, that the modules on the disk shelf have
multipath connections to the storage controller, and that you are hot-swapping
one of the following:
◆
an LRC with another LRC
◆
an ESH with:
❖
another ESH
❖
an ESH2
❖
an ESH4
◆
an ESH2 with:
❖
another ESH2
❖
an ESH4
◆
an ESH4 with another ESH4
Note
A hot-swap of an ESH or ESH2 with an ESH4 requires that you perform a
minimum upgrade to Data ONTAP 6.4.4 or later and replace both modules in the
disk shelf. A hot-swap of an ESH with an ESH4 is not supported with NetCache
appliances.
Depending on the module or modules you are hot-swapping and their position in
the loop, you may need to order additional cables appropriate to the modules. See
“
Disk shelf cabling requirements ” on page 34 for additional requirements.
If you are hot-upgrading or hot-downgrading these devices, see “ Hot-upgrading
or hot-downgrading a disk shelf ” on page 59.
Caution
If you attempt to hot-swap the module on a disk shelf that does not have
multipath connections, you lose all access to the drives on this disk shelf as well
as those below it.