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Glossary
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SCSIport
The SCSIport driver is a feature of the Microsoft
®
Windows
®
storage architecture, delivering SCSI
commands to the storage targets. The SCSIport
driver works well with storage using parallel SCSI.
Single Bit ECC Errors
ECC stands for error correcting code. ECC errors are
errors that occur in the memory, which can corrupt
cached data so that it has to be discarded. Single-bit
ECC errors can be handled by the firmware and do not
disrupt normal operation. A notification will be sent if
the number of single-bit errors exceeds a threshold value.
SMART
Acronym for Self-Monitoring Analysis and Reporting
Technology. The self-monitoring analysis and
reporting technology (SMART) feature monitors the
internal performance of all motors, heads, and drive
electronics to detect predictable drive failures. This
feature helps monitor drive performance and
reliability, and protects the data on the drive. When
problems are detected on a drive, you can replace or
repair the drive without losing any data.
SMART-compliant disks have attributes for which
data (values) can be monitored to identify changes in
values and determine whether the values are within
threshold limits. Many mechanical failures and some
electrical failures display some degradation in
performance before failure
SMP
Acronym for Serial Management Protocol. SMP
communicates topology management information
directly with an attached SAS expander device. Each
PHY on the controller can function as an SMP initiator.
Span
A RAID technique used to combine storage space
from groups of physicals disks into a RAID 10 or 50
virtual disk.
Spare
A physical disk available to replace another physical
disk in case that physical disk fails.
SSP
Acronym for Serial SCSI Protocol. SSP enables
communication with other SAS devices.
Each PHY
on the SAS controller can function as an SSP
initiator or SSP target.
Storport
The Storport driver has been designed to replace
SCSIport and work with Windows 2003 and beyond.
In addition, it offers better performance for RAID
controllers, providing higher I/O throughput rates,
improved manageability, and an upgraded miniport
interface. For example, while SCSIport allows a
maximum of 254 commands per controller, Storport
allows 254 command per logical unit number (LUN).
STP
Acronym for Serial Tunneling Protocol, STP, enables
communication with a Dell-qualified SATA device
through an attached expander.
Each PHY on the
SAS controller can function as an STP initiator.
Stripe Element
A stripe element is the portion of a stripe that resides
on a single physical disk. See also
striping
.
Stripe Element Size
The total disk space consumed by a stripe not
including a parity disk. For example, consider a stripe
that contains 64 KB of disk space and has 16 KB of
data residing on each disk in the stripe. In this case,
the stripe element size is 16 KB and the stripe size
is 64 KB.
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