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Document:	StorageWorks RAID Array 230/Plus Subsystem
Order Number:	AV-R0O7JA-TE
Revision:	0
Pages:	3
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OCR Text

StorageWorks RAID Array 230/Plus Subsystem
StorageWorks RAID Array 230/Plus subsystem is a hardware-based RAID solution for Alpha system
platforms that use the industry-standard PCI bus. The StorageWorks RAID Array 230/Plus controller
(KZPAC) is used in conjunction with supported drives and enclosures to build a complete RAID subsystem.
Depending upon the workload, system and storage configurations, and RAID subsystem parameter setttings,
the StorageWorks RAID Array 230/Plus will demonstrate higher performance and throughput than its
predecessor, the StorageWorks RAID Array 230.
RAID Array 230/Plus provides RAID levels 0 (striping), 1 (mirroring), 0+1 (striped mirrored sets), and 5
(striping with distributed parity). By providing RAID functionality, it binds a collection of disk drives into
logical drives to provide data redundancy and/or increased performance. Performance improvements are
obtained by striping user data across a number of disk drives, thus overlapping disk operations (RAID 0,
0+1). JBOD (Just a bunch of disks) is available if no RAID is required and offers connectivity options with
single disks.
Redundancy is obtained by keeping additional copies of user data on a redundant disk drive (RAID 1), or by
generating and storing data parity so that user information can be reconstructed in the event of a disk failure
(RAID 5). In either case, the application continues to run without data loss in the event of a single disk drive
failure.
For more information on RAID, see the Buyer's Guide to RAID Storage (EC-G2412-45).
The StorageWorks RAID Array 230/Plus subsystem comprises a PCI backplane RAID controller, operating
system specific RAID drivers and utilities (software), documentation, and disk drives with appropriate cables
and enclosures. The controller provides RAID functionality. It is a backplane controller, and plugs directly
into the PCI bus inside the system enclosure. Therefore, RAID functionality can be provided for disk drives
inside, as well as outside, the system enclosure.
In a standalone RAID subsystem, controllers and disks are housed in separate StorageWorks pedestal
enclosures while the PCI-to-SCSI adapter resides in the server. In a server based solution such as the RAID
Array 230/Plus, controller acts as both the controller and adapter in a single component. This provides a
lower-cost solution than traditional standalone RAID controllers.
The StorageWorks RAID Array 230/Plus controller is available in three models:
• a single SCSI channel model with 4 MB of cache that supports up to 7 disk drives,
• a three SCSI channel model with 4 MB of cache that supports up to 21 drives, and
• a three SCSI channel model with 8 MB of cache that supports up to 21 drives
RAID drivers and utilities provide the following functionality:
• RAID subsystem configuration (display drive array map, bind disks into RAID sets, configure array
parameters, etc.)
• RAID subsystem monitoring and fault reporting. Status changes are reported to OPCOM (OpenVMS),
System Console (Digital UNIX) Event Viewer (Windows NT); written to a log file (Digital UNIX and
OpenVMS); and notification can be sent via MAIL (OpenVMS).
• RAID subsystem maintenance (parity check and repair, firmware updates)
System Support
The StorageWorks RAID Array 230/Plus subsystem is supported on Alpha systems that use the industrystandard PCI bus. Currently, the Alpha 4000/4100 servers are supported. Other Alpha servers will be
supported in the near future. Please refer to the system specific ordering menu for currently supported
options and configuration guidelines.
Operating System Support
StorageWorks RAID Array 230/Plus subsystem is supported on
• Digital UNIX V3.2G; Digital UNIX V4.0A
• OpenVMS 6.2-1H3 or later, and
• Windows NT for Alpha V3.51 with Service Pack 4 or later

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StorageWorks RAID Array 230 Plus Subsystem
Ordering Information
StorageWorks RAID Array 230/Plus Subsystem consists of the following key components:
• PCI RAID controller, which plugs in directly to the server’s PCI bus (KZPAC).
• Software and documentation kit
• Device drivers and RAID utilities for chosen system platform.
Ordered separately are:
•
•
•
•

StorageWorks disk drives
Enclosures, as required, to house disks
Cables to connect controller to disk drives
Additional StorageWorks components (redundant power supplies, fans, etc.)

Controllers, Cables, and Battery Backup Components
KZPAC-AA

KZPAC-CA

KZPAC-CB
KZPAC-SB
BN31K-0E
BN31L-1E
BN31M-1E
BN31S-1E
BN31S-02

KZPSC-UB

AV–R07JA–TE

Single (FWSE) SCSI channel PCI backplane RAID controller with 4 MB of cache memory for
Alpha systems, 68-pin HD connector on the module for internal connection and an 0.8 mm 68 pin
connector on the module’s stannadard PCI bulkhead for external connections. Includes
StorageWorks RAID Array 230/ Plus Subsystem Software, StorageWorks RAID Array 200
Management Utility for OpenVMS and Digital UNIX, StorageWorks RAID Array 200 Management
Utility for Windows NT, media licenses, and documentaition. Requires SCSI cables, not included.
Three (FWSE) SCSI channel PCI backplane RAID controller with 4 MB of cache memory for
Alpha systems, 68-pin HD connectors on the module for internal connection, two channels available
through 0.8 mm 68 pin connectors on the module’s standard PCI bulkhead for external connection,
the third channel can be connected to a 0.8 mm 68-pin connector on a standard PCI bulkhead
connector via an adapter cable. Includes StorageWorks RAID Array 230/ Plus Subsystem Software,
StorageWorks RAID Array 200 Management Utility for OpenVMS and Digital UNIX, StorageWorks
RAID Array 200 Management Utility for Windows NT, media licenses, and documentaition.
RequiresSCSI cables, not included.
Same as the KZPAC-CA, but includes 8 MB of cache memory.
Dual bulkhead interconnect assembly. Allows the third channels from two PCI backplane RAID
controllers, in any combination of KZPSC or KZPAC, to share one additional PCI bulkhead
positionassembly, thereby saving a bulkheadPCI slot in comparison to utilizing two BN31K-0Es.
SCSI cable and bulkhead assembly for internal connection from KZPAC-CA/CB module to system
cabinet bulkhead (17-04108-01). Use to connect a single KZPAC-CA/CB 3rd SCSI channel to
system bulkhead. - 16 bit capable - 0.5m
External 1.5 m, 8-bit SCSI-2 cable. (17-04107-01). Connects 0.8 mm 68-pin HD connector from
PCI bulkhead connector to 50-pin HD SCSI connector on StorageWorks 8-bit device enclosure. Use
one for each KZPSC external SCSI channel.
External 1.5 m, 16-bit SCSI-2 cable (17-04107-02). Connects 0.8 mm 68-pin HD connector from
PCI bulkhead connector to 68-pin HD SCSI connector on StorageWorks 16-bit enclosure (BA354).
Use one for each KZPSC or KZPAC external SCSI channel.
External 1.5 m, 16-bit SCSI-2 cable (17-04107-03) Connects 0.8 mm connector from the PCI
bulkhead to 68-pin HD SCSI connector on a BA356, StorageWorks 16-bit enclosure, I/O personality
module (BA35X-MH). Use one for each KZPSC or KZPAC external SCSI channel.
External 2.0 m, 16-bit SCSI-2 cable (17-04107-03Connects 0.8 mm connector from the PCI
bulkhead to 68-pin HD SCSI connector on a BA356, StorageWorks 16-bit enclosure, I/O personality
module (BA35X-MH). Use one for each KZPSC external SCSI channel. Specific to Alphaserver
4000 systems. (This cable is required with Alphaserver 4000 configurations only when one of
three internal storage shelf is at the maximum distance from the CPU. For all other storage
shelves, the BN31S-1E is the required cable.)
Battery module for all KZPSC or KZPAC cache memories. Provides up to 12 hours of memory
retention for 4 Mbyte of cache memory or 8 hours with the 8 MB cache memory with KZPAC.
Provides up to 20 hours of memory retention with KZPSC. These guidelilnes are based upon new,
fully-charged batteries. If batteries are not fully charged, a decrease Some deterioration in memory
retention time will occur.should be expected over time.

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StorageWorks RAID Array 230/Plus Subsystem
RAID Level/Drives supported
RAIDLevel

Physical Drives
per logical drive

Usable
Storage

Data
Redundancy

0
1
0+1
5
JBOD

2-8
2
3-8
3-8
1

100%
50%
50%
66%-87%
100%

No
Yes
Yes
Yes
No

Max. Number drives Max. Number drives
KZPAC-AA
KZPAC-CA/CB

7
6
7
7
7

21
16
21
21
8

Specifications
Non-RAID device support
Non-Disk device support

Supported Disk Drives

Drive Reconstruct
Disk hot swap
Disk hot spare
Redundant power supplies
Redundant controllers
Redundant fans
Mixed drive types
Mixed RAID levels within Drive Group
Configurable reconstruct time
Stripe size
Write through cache
Write back cache
Battery Backup for Cache
Boot capability
Number of controllers/system

Cache support

Yes, disk drives (JBOD)
Yes, Tape drives and CD-ROM drives for Windows NT only
Tape Drives: TLZ06, TLZ07, TZ86, TZ88
CD-ROM Drives: RRD43, RRD44, RRD45
RZ26N-VA/VW (1.05 Gbytes)
RZ28D-VA/VW (2.1 Gbytes)
RZ28M-VA/VW (2.1 Gbytes)
RZ29B-VA/VW (4.3 Gbytes)
Automatic.
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Variable, 8K-64KB
Yes, User Selectable (default)
Yes, User Selectable (optional)
Yes
Bootable from RAID set (System dependant)
4 RAID controllers per system in any combination of RAID Array
210, 230, or 230/Plus subject to minimal operating system levels
and system specific configuration guidelines.
4 - 8 Mbytes as specified in model numbers

Technical Information
System bus interface
Controller form factor
Supported RAID levels
Supported drive channels
Number of drive groups
SCSI channels
Number of disks supported per
controller

Industry-standard 32 bit PCI
Industry-standard full length PCI card
0, 1, 0+1, 5, JBOD (“just a bunch of disks”)
1 or 3 SCSI channels
Up to 8 per controller
SCSI-2, 8 and 16 bit, Single-Ended,Fast (10/20 Mbytes/second)
Up to 7 per SCSI channel:
KZPAC-AA - 7 disk drives maximum, per ‘Drives supported’ table
KZPAC-CA/CB - 21 disk drives maximum, per ‘Drives supported’ table

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