maturity of hotplug disk storage devices

Hi,

I am looking for some advice on the maturity of hotplug functions for Linux disk storage devices. I looked into this two years ago and found that although insertion/removal appeared to often work, in particular with scsi, it was not really officially supported thru the entire protocol stack at the time.

Now, I find evidence in general, hotplug support has improved, presumeably positively influenced by subsequent USB and firewire development. But disks are more complex than printers, scanners, etc so Im having a difficult time forming an opinion about how "official" this
all is for disk storage. Have the improvements gotten into disk
storage related areas also? Should I really consider relying on hotplug disk storage in a mission critical application?

Well, I would really be interested in any comments anyone had, privately or publicly, on the maturity of hotplug disk storage in Linux 2.4. Does insertion/removal of existing/new devices work reliably on IDE, SCSI, Fibrechannel, USB, iee1394? Is it "officially" supported? Are you using it on a mission critical machine? Do things like the MD driver and LVM handle hotplugged drives reliably well?

Of course I assume appropriate hardware doing the right things electrically and that any filesystem is unmounted.

Any help understanding the current state would be greatly appreciated!

Thanks,
Mark
[email protected]

P.S. Ive looked thru the LDP, google, and elsewhere with little luck; apologies that I can't look at the home page for the hotplug project because I am in China, and all sourceforge project home pages are blocked. sigh.....

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