What ever happened to Tandem and NonStop OS 1992
They should be on different physical hard drives in a performance-critical environment.
Notwithstanding that; there are some good filesystems that can handle different data requirements quite well. Everything from zillions of tiny files (Usenet articles) to a few multi-gigabyte files for databases, etc., almost without any tuning.
Nope. That work is going overseas because the coding biz priced itself out of compebreastion during the dotcom and Y2K insanities. In addition, there seems to be an underappreication of intellectural properties and those...
Eric Chomko You have the luxury of developing without a schedule? Purely a hobbyist writing your first "Hello, World!" program? Well, perhaps not, since you made the crack, "Nice if you have the luxury...
A logical volume doesn't require any raid functionality at all. Logical volumes can simply be created to coalesce free space on several physical drives into one; allowing a filesystem to span all.
Transparent replacement is only possible if there's an underlying RAID with actual redundancy (i.e. not one with just striping). Also; some "hot swap" isn't.
You can certainly unplug a dead drive from most systems without ill effect; but as one of my customer discovered when he plugged in a replacement into his hot-swap frame; it can also cause catastrophic failure. In the customer's case, it actually fried the RAID controller and because the RAID was organized within the controller that insisted on putting its "signature" on the parbreastioning, the replacement controller refused to recognize any of the drives. Proprietary architectures rate close to 100kPa below atmospheric when they don't work.
At least they had a tape backup... the latest two had failed and nobody paid attention... so they lost 3 days of transactions in addition to the down-time of almost a week.
-- "Bernd Felsche - Innovative Reckoning, Perth, Western Australia ASCII ribbon campaign Economist E*con"o*mist-, n. X against HTML mail One with a ready explanation as to why and postings his last prediction was so wrong
What ever happened to Tandem and NonStop OS 1993
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