| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 6711.1 | Real Soon Now... | XDELTA::HOFFMAN | Steve, OpenVMS Engineering | Thu May 22 1997 13:27 | 12 |
|
UltraSCSI support is targeted for an upcoming OpenVMS hardware release,
depending on the timing, either as part of the Hailstorm release, or in
close sequence with that release. The P2SE+ controller is targeted for
Q2CY97, as are the KZPBA-%% series controllers. (KZPBA support and
configuration restrictions for OpenVMS releases prior to Hailstorm are
being discussed.)
As for the current best performance combination on the market, donno...
(I assume you have reason(s) why you are planning on a "traditional"
SCSI disk widget, rather than host memory or a solid state disk, etc.)
|
| 6711.2 | controllers vs. adapters | SUBSYS::BROWN | SCSI and DSSI advice given cheerfully | Fri May 23 1997 08:09 | 10 |
| The fastest disks shipping today are the RZ1BB, RZ1CB, and RZ1DB.
They run at Ultra speeds (20MB/s narrow, 40MB/sec wide), spin at
7200RPM, and have sizeable caches, which they use intelligently.
The top sustained data rate (limited by the linear bit density)
is somewhere around 30-50% higher than the RZ29B.
I don't know if we're shipping any UltraSCSI controllers yet.
Adapters, yes. A word about definition: in Shrewsbury jargon,
a controller can create and manage RAID sets; an adapter just
talks to individual disks.
|
| 6711.3 | | OTOOA::LAVIGNE | | Fri May 23 1997 13:36 | 7 |
| The Ultra-SCSI product set will roll out from July to September. If
you need PID information contact your Storage Rep and get him or her to
help out.
Regards,
JP Lavigne
|
| 6711.4 | Support uder 6.2-1h2 ? | ODIXIE::RREEVES | | Tue May 27 1997 13:16 | 9 |
| Do you know if the RZ1CB-SB is supported under Alpha OpenVMS Version
6.2.-1h2 and can I substitue these drives where I currently have
RZ29B-VW's ? Are they supported in the same shelfs as the RZ29B-VW's ?
Do you think they will be faster than the RZ29B-VW's when connected
to a KZPSC ?
Regards,
|
| 6711.5 | What adapter do we ship today? | ODIXIE::RREEVES | | Tue May 27 1997 13:18 | 2 |
| What Ultra SCSI adapter do we ship today which would be supported
under Alpha VMS on a 2100A 5/250 ?
|
| 6711.6 | OpenVMS Presently Lacks UltraSCSI Support... | XDELTA::HOFFMAN | Steve, OpenVMS Engineering | Wed May 28 1997 14:42 | 6 |
|
OpenVMS Alpha presently lacks any UltraSCSI operating system support.
We are looking to remedy this gap Real Soon Now...
The various UltraSCSI widgets (KZPBA) that are starting to become
available are listed in WebIR (http://webir.das.dec.com/).
|
| 6711.7 | Thanks forthe answer | ODIXIE::RREEVES | | Mon Jun 02 1997 09:41 | 7 |
| Steve ,
Thanks for the answer.
Regards,
Ray
|
| 6711.8 | rz1 sizeable caches | MSE1::PCOTE | press one now for personal name | Thu Jun 05 1997 11:40 | 13 |
| <<< Note 6711.2 by SUBSYS::BROWN "SCSI and DSSI advice given cheerfully" >>>
-< controllers vs. adapters >-
> The fastest disks shipping today are the RZ1BB, RZ1CB, and RZ1DB.
> They run at Ultra speeds (20MB/s narrow, 40MB/sec wide), spin at
> 7200RPM, and have sizeable caches, which they use intelligently.
Are the "sizeable caches" still operative when the disks are
members of a RAIDset or is this only valid when the disk
is configured as a JBOD or connected directly to an adapter?
thanks, Paul
|
| 6711.9 | yes | SUBSYS::BROWN | SCSI and DSSI advice given cheerfully | Fri Jun 06 1997 08:23 | 6 |
| The disk's read cache is still used when you're in a RAIDset.
Also, data in the disk's write cache can be used for reads.
You may see improved performance for three reasons: more data can be cached,
the new drives are smarter about what to cache, and the response time
on a cache hit has been reduced (smarter firmware, faster micro).
|