Chapter 2. Architecture and technical overview
79
– Maximum number of volumes is 16 per blade server (maximum of 128 volumes per
chassis).
– One volume can be mapped to all 6 blades in the chassis.
Mixing HDDs of different capacities in a single volume is supported. However, the total
volume size is aligned with the size of the smallest HDD, and excess space on
larger-sized HDDs is not used.
Both SAS and Near-line SAS (NL SAS) hot swap HDDs are supported, and intermixing
SAS/NL SAS drives is supported as well. However, each storage pool must have hard
disks of the same type; that is, SAS or NL SAS. SATA drives are not supported by SAS
RAID Controller Module.
Global hot-spare drives are supported. The drive designated as a hot-spare should be as
large as, or larger than, other drives in the system.
Blade boot from logical volume is supported.
Path failover is supported with IBM Subsystem Device Driver Device Specific Module
(SDD DSM) for Windows® and Device Mapper Multipath (DMM) for Red Hat/Novell SUSE
Linux.
External tape attachments are supported.
For more information about the SAS RAID Controller solution, see:
SAS RAID Controller Installation and User Guide:
http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5078040
SAS RAID Controller Module Interoperability Guide
http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5078491
SAS RAID Controller Module Detailed Host Attachment Guide (Remote Boot included):
http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5078491
2.10.2 IBM System Storage
The IBM System Storage Disk Systems products and offerings provide compelling storage
solutions with superior value for all levels of business.
IBM System Storage N series
IBM N series unified system storage solutions can provide customers with the latest
technology to help them improve performance, management, and system efficiency at a
reduced total cost of ownership. Several enhancements have been incorporated into the N
series product line to complement and reinvigorate this portfolio of solutions. The
enhancements include:
The new SnapManager® for Hyper-V provides extensive management for backup,
restoration, and replication for Microsoft® Hyper-V environments.
The new N series Software Packs provides the benefits of a broad set of N series
solutions at a reduced cost.
An essential component to this launch is Fibre Channel over Ethernet access and 10 Gb
Ethernet, to help integrate Fibre Channel and Ethernet flow into a unified network, and
take advantage of current Fibre Channel installations.
For more information, see the following web page:
http://www.ibm.com/systems/storage/network
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