Silicon Graphics InfiniteStorage 120, Руководство пользователя, Страница: 23 / 42

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Hot Swap
The term hot swap refers to the ability to remove and replace a component in the drive
module while the drive module is powered on.
N
OTE The InfiniteStorage 120 is a JBOD module, you must halt all I/O transfers
between the module and the host system(s) before you can perform any hot swap
replacement of a disk drive.
Components that you can hot swap include the following:
•
ESM canisters
•
Power-fan canisters
•
Disk drives
The following paragraphs briefly describe the difference between a drive module capable
of hot swapping components and a drive module that does not have this capability.
In a drive module that has two ESMs and two power-fan canisters, these components are
redundant, (note that the midplane circuit board is not). If one of these redundant
components fails, you can replace it without turning off the power and without
interrupting data processing.
In a drive module that has one ESM, you cannot replace the ESM without turning off the
power to the drive module, which interrupts data processing. Similarly, in a drive module
that uses a single power-fan canister, you cannot replace the power-fan canister without
turning off the power to the drive module.