IBM H Series Installation And Service Manual page 268

2. Loosen the screws that hold the disk drive cover to the drawer and remove the
disk drive cover, store it in a safe place.
Attention: Physically removing a hot-swappable disk drive from the CPU
Drawer before it has been removed from the operating system configuration may
cause unrecoverable data corruption.
3. Verify that the disk drive has been removed from the operating system configura-
tion. The yellow LED on the hot-swap disk drive should be off.
Attention: Use caution while handling disk drives. Drives are more likely to be
damaged during installation and service. Bumping or handling a drive roughly
can cause latent failures. Don't stack drives and always use appropriate ESD
practices. Dropping a drive as little as 1/4 inch can cause latent failures. Disk
drives can take 30 seconds to spin down, so allow at least 30 seconds after
switching off the hot-swappable disk drives for removal.
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RS/6000 Enterprise Server Model H Series Installation and Service Guide