HP A5272A - SureStore E Disk System SC10 Storage Enclosure Service Manual page 77

Hp surestore e disk system sc10 user and service guide
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Note
Switch
Reasons to Set ON (|)
1. Full Bus
a. Full-bus mode is the only way to
access all ten disks with one BCC.
b. With two BCCs, full-bus mode
allows four external connections to
the bus.
c. Full-bus mode with two BCCs gives
redundant environmental services.
2. JBOD
Required for disk system.
3. Bus Reset-
Automatic bus reset reduces the
Pwr Fail
chances of data corruption and saves
the 30 to 60 seconds that the host
would spend determining that the disk
system is unavailable. Bus reset
signals the host to resend outstanding
I/O requests.
4. Address High High addresses give disks high priority
on the bus, saving access time.
5. Bus Reset-
Automatic bus reset reduces the
Hot Swap
chances of data corruption and saves
the 30 to 60 seconds that the host
would spend determining that a disk is
unavailable. Bus reset signals the host
to resend outstanding I/O requests.
Reasons to Set OFF (0)
a. Split buses allow you to mirror disks
within the disk system.
b. Split-bus mode uses fewer IDs on
the bus, improving bus
performance.
N/A for this product.
Bus control is restricted to the host.
High addresses are needed for other
devices on the bus.
a. No bus reset reserves bus control to
the host.
b. No bus reset avoids resetting the
entire bus for one disk.
77

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