Hitachi Path Failover is one of several management solutions which HDS
offers to complement its Hitachi Freedom 5700E storage systems.
Path Failover is server-based software that enhances your RAID
subsystems by providing automatic error recovery from server-to-RAID
connection failures. Allowing systems administrators to add redundant
SCSI connections between data servers and RAID subsytems, Path Failover
improves reliability and performance.
Path Failover allows your servers to recover promptly from SCSI interface
failures, providing continuous access to data should a SCSI path fail.
Using a redundant SCSI connection from the server to a dual-controller
RAID subsystem, Path Failover automatically re-routes I/O from a failed data
path over to the remaining path. This eliminates the SCSI host adapter
and the SCSI bus (cables, terminators, and connectors) as potential
points of failure.
Protection for multiserver environments
Path Failover also increases overall uptime for high-availability
configurations where two servers share the same disk array. Insulating
both single and clustered servers from failures, Path Failover improves
overall availability—your data path errors are recovered in
seconds, with no impact on your server applications.
Active redundancy, improved performance
The addition of an active redundant data path between your server and
RAID subsystem provides a substantial performance increase. You enjoy up
to twice the transfer rates of traditional, single-connection RAID
implementations, without compromising availability.
Path Failover protects configurations comprising either one or two servers,
with two SCSI, Ultra-SCSI, or Fibre Channel adapters per server. In
addition, Path Failover is appropriate for use with interconnect technologies
(SCSI, DSCSI, Ultra-SCSI, and FC/AL), dual controller RAID subsystems,
and host bus adapters. Path Failover supports Sun Solaris versions 2.4 and 2.5, and
Windows NT versions 3.51 and 4.0.
Hitachi Data Systems—For computing as critical as your business
System administrators must guard against SCSI path failure to assure
high availability and performance. When a SCSI path does fail, instant
error recovery with no impact on server applications is critical. By
offering Path Failover to its customers, Hitachi Data Systems fulfills its
commitment to meet demanding customer requirements with the most
appropriate solution. From the desktop to the glass house, you can count
on HDS to be there, helping you attain business-critical objectives in centralized
management of enterprise-wide storage.
* Available under license and an HDS Services Agreement
©1998, Hitachi Data Systems Corporation. All Rights
Reserved/048/WDISK-017.
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Hi-Track® Storage Expert Systems
Installed with Hitachi Data Systems hardware and part of HDS'
maintenance agreement, Hi-Track monitors HDS storage systems
and mainframes 24x7 to protect against unforeseen disruption.
Hi-Track makes extensive use of expert systems to analyze raw
data, determine the cause of the problem, and recommend necessary
action—while ensuring the confidentiality of your information.
More specifically, Hi-Track improves efficiency by:
- Monitoring and collecting environmental/technical data
- Analyzing fault-symptom codes
- Running remote diagnostics
- Transmitting error information to specialists
- Recommending corrective actions.
Hi-Track is foremost an economical service supplement because it
assures immediate service without tradeoff—you don't have to
maintain a 24x7 service staff and you don't have to wait should
systems go down. When Hi-Track detects a discrepancy, the system
automatically dispatches a service representative with the parts
needed to resolve the problem before it can have an impact
on business operations. In other cases, when all that's needed is
a microcode patch, the problem can be solved over the phone.
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