Raid rom setup questions, Rebuilding arrays questions – Nvidia 4 User Manual
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MediaShield RAID Frequently Asked Questions
• Why is the cumulative size of a RAID 0 (Stripe) or RAID 0+1 (Stripe-Mirror) not equal
to the sum of the drives?
The drive size is controlled by stripe blocks.
For RAID 0 : Array size = (smallest drive size) x ( number of disks in the array)
For RAID 0+1 : Array size is = ((smallest drive size) x ( number of disks in the array)) / 2
• Why can I not get into Windows after adding a non-bootable array?
Possible cause would be adding the boot drive to the array and then clearing the array.
RAID ROM Setup Questions
• Why can I not get into the RAID ROM Setup?
You must enable RAID functionality in the system BIOS as explained in
.
• Why do my hard drives not appear in the RAID ROM Setup?
From the RAID Config window, you must enable RAID and then enable the disks that
you want to use as RAID disks. See
“Setting Up the BIOS” on page 13
for more
information.
• What is the Optimal Striping Block Size in the RAID ROM Setup?
The default optimal striping block size is 64KB. NVIDIA recommends using the
optimal block size.
• What does BBS stand for in the RAID ROM [F10] setup?
BBS stands for BIOS Boot Specification. This indicates that the boot device is defined in
the BIOS.
• What does “Clear Disk” mean in the RAID ROM Setup?
Clear Disk clears the MBR (Master Boot Record). This is needed to prevent invalid data
from appearing in the MBR space on any of the drives included in the array. Not doing
so could render the system unstable.
Rebuilding Arrays Questions
• How long does the RAID rebuilding process take?
In the rebuilding process, all data is copied from one hard drive to another and then the
data is synchronized between the two hard drives. Because the rebuilding process
occurs in the background in a way that does not affect system performance, the process
can take some time and the time it takes depends on the size of the drive, system
performance and other factors.
“Rebuilding a RAID Array” on page 132
for more information.