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- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!monu6!vaxc.cc.monash.edu.au!russell
- From: russell@vaxc.cc.monash.edu.au
- Newsgroups: comp.sys.dec
- Subject: Info on Storage Subsystems for Vax Clusters
- Message-ID: <1992Aug18.190607.89795@vaxc.cc.monash.edu.au>
- Date: 18 Aug 92 19:06:07 +1000
- Organization: Computer Centre, Monash University, Australia
- Lines: 55
-
- Vax Cluster Storage Solutions
- =============================
-
- I am writing to seek information about the new DEC STORME system
- and DEC RAID directions. We have at Monash University many Vax
- systems 64xx, 65xx and are soon to take delivery of a 66xx system.
-
- As far as disk subsystems goes we have made use of the
- HSC40/50/70 technology with RA70/71/72/81/82/90/92, Emulex, MTI,
- and NEC SDI drives. We have a DEC MPP with a parallel disk array
- together with numerous Vaxstations and Decstations.
-
- With our large system workload increasing we are looking
- down the track to try and find what new storage solutions are likely
- to be available in the near future. The HSC90s with Cache may not
- be the only way to go. We are also looking at ESE50 solid state
- disks as a possible solution.
-
- I am looking out for equipment that will replace the HSCs
- or co-exist with them on the CI Bus, that is, connected to the Star
- coupler directly be faster in terms of I/O requests /sec and have
- some measure of redundancy maybe a RAID solution.
-
- The best information I have at present is that MTI has a
- system called Failsafe and another called the Stingray, also CMD
- technology is working on a RAID 5 system that will interface to
- the CI bus.
- Have these Companies made agreements with DEC to interface
- on to the CI bus, or would we be likely to see some legal issues
- comming to the surface as they have in the past ?
-
- Are there any other manufacturers out there that are working
- in this area ? Is DEC itself looking at RAID solutions ? Just how
- does a parallel disk array appear to VMS ? Is it just one big logical
- drive or can it be made to appear as several smaller logical drives?
-
- What happens in the Backup area? If chunks are distributed
- across multiple spindles is backup in the traditional sense meaningful?
-
- If more than one element in the array fails and the RAID
- system is not able to reconstruct the data what is the recovery time?
-
- The purpose of this posting is an information gathering
- exercise and should not be considered as the direction the University
- Computer Centre is planning to move towards. I would appreciate
- hearing from any site or anyone with experience with the products
- mentioned above or any answers to the questions posed.
-
- Thanks in anticipation,
- Russell Keil
- Vax Engineering.
-
- email:- Russell.Keil@cc.monash.edu.au
-
-
-