the DS4800 either ships with the 8-storage-partition premium feature or can be
ordered with 8-, 16-, or 64-storage-partition premium features. The operating
system host kit shipped with the DS4800 also depends on the model ordered.
DS4800 models 80H, 82H, 84H, and 88H come with the Windows operating system
and 8 storage partitions. Please contact your IBM sales representatives or reseller
for information on the various DS4800 models and options.
Attention: DS4800 models 82, 84 and 88 will be shipped with controller firmware
version 6.15.xx.xx. The DS4800 model 80 will be shipped with version 6.16.xx.xx
and will not have support for versions 6.15.xx.xx or 6.14.xx.xx as will the other
models.
Fibre channel defined
Fibre channel technology is outlined in the SCSI-3 Fibre Channel Protocol
(SCSI-FCP) standard. Fibre channel is a high-speed data transport technology that
is used for mass storage and networking. Using a fibre-channel arbitrated loop
(FC-AL), more than 100 fibre-channel devices
1
can be supported, compared to 15
small computer system interface (SCSI) devices.
The optical fibre channel connection from the DS4800 to fibre channel host bus
adapter ports, or from the DS4800 to DS4000 storage expansion enclosure ports, is
a 4-Gbps fibre channel connection that supports a data transfer rate up to 400
MBps at half-duplex and 800 MBps at full-duplex.
SATA defined
The Serial Advanced Technology Attachment (SATA) interface offers increased data
rate performance over Parallel Advanced Technology Attachment (ATA), while
maintaining the benefits of ATA. SATA is designed to overcome the performance
barriers that have been forecasted for current parallel technologies while
maintaining the cost-efficiency of Parallel ATA. SATA specifications allow for thinner,
more flexible cables, and lower pin counts. It also enables easier, more flexible
cable routing management and the use of smaller connectors than is possible with
the existing Parallel ATA technology.
The Serial ATA Working Group introduced the first SATA specification, Serial ATA
1.0, in 2001 http://www.serialata.org.
Features at a glance
Table 3 on page 3 summarizes the features of the storage subsystem. For a list of
the operating specifications, such as weight, height, and heat output, see
“Specifications” on page 21.
1. For the DS4800, each drive is considered to be a device in a fibre channel loop, even though the DS4800 might connect with
SATA as well as fibre channel drives.
2 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide
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