Dell PowerEdge RAID H700 User Manual page 161

Disk Roaming
Moving disks from one slot to another on a controller.
Disk Subsystem
A collection of disks and the hardware that controls them and connects them to
one or more controllers. The hardware can include an intelligent controller, or
the disks can attach directly to a system I/O bus controller.
Distributed Parity
Parity data is distributed among all the physical disks in the system. If a single
physical disk fails, it can be rebuilt from the parity of the applicable data on the
remaining physical disks.
DKMS
Dynamic Kernel Module Support. Designed by Dell, DKMS creates a
framework in which kernel-dependent module source can reside so that it is easy
to rebuild modules as you upgrade kernels. DKMS is used in the upgrade
process for drivers for Red Hat Linux and SUSE Linux Enterprise Server.
DUD
Driver Update Diskette. A DUD is an image of a diskette stored as a regular file.
To use it, you have to create the content to a real diskette from this file.
The steps used to create the diskette depend on how the image is supplied.
E
ECC Errors
Error Correcting Code. It refers to errors detected during memory transactions.
Single-bit ECC errors can be handled by the firmware and do not disrupt
normal operation. ECC double-bit or multi-bit errors are more serious, as they
cannot be corrected and may result in the controller becoming inoperable.
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Glossary