AH residence

[John Nebel]

Dual-redundant fibre-channel disk controllers run the AH disks and all the AH data is stored redundantly, ie two real-time copies.

It's pretty difficult to get reliability in the computer realm which is anything close to the level of reliability to which JBL afficianados are accustomed.

[johnaec]

AH disks?

John

[John Nebel]

John

Sorry, Audio Heritage - Ann and I have got accustomed to the shorthand "ah"

We help Don with the technical computer details.

John

[JuniorJBL]

What part of CO are you in.
Maybe I can help out with some things AH as well. I am in the buisness as well. PM me and let me know if anything is needed. Nice Rig!!
Shane

[Mr. Widget]

Oh sorry, wrong thread.

[Don McRitchie]

We help Don with the technical computer details.

They do more than that. For those that aren't aware, John hosts our entire site at no cost to us. This is a very considerable contribution. We have two domains, that between them, have around 800MB of data and a monthly bandwidth that exceeds 30GB per month. John began hosting our site late last fall and I am not aware of any time that the site has been down since then. John and Ann have been invaluable in maintaining and supporting this site.

BTW, the new disk array is kewl.

[johnaec]

Being IT manager where I work, I can really appreciate what John's doing! Kudos!!

[boputnam]

Originally posted by John Nebel
Dual-redundant fibre-channel disk controllers

Dang it John!! Now I need one of THEM, too!!

[John Nebel]

Bo,

Heh, the cache backup batteries are lead-acid. You'd have to consider the disposal issues - just went through that with a pile of them - they have to be replaced every two years.

John

[boputnam]

We could market them as "alternative energy" sources - probably worth a bundle out here...

Hell, down in the Haight, they'll pay-up for anything with "acid" in it... :shock:

[John Nebel]

Bo,

Your good cheer and sense of humor are great!

Continuing on in my role as straight man...

Yesterday a one of the disk shelves went offline, essentially 8 disks disappeared, so to speak.

The three AH volumes - vBulletin, web, and ftp - fell over onto the surviving copy - that much was supposed to happen. The interesing bit is the the controller then reestablished redundancy on the remaining disks since they had enough free space.

The volumes which were not redundant disappeared from the hosts, but in the case of VMS, the important one was shadowed - it's more than a million e-mail messages - and it just dropped out of the shadow set and the operating system said goodbye and continued.

%%%%%%%%%%% OPCOM 18-MAR-2004 16:40:39.70 %%%%%%%%%%% (from node HERA at 18-MAR-2004 16:40:39.68) Device $1$DGA300: (HERA PGB, CRONUS) is offline. Mount verification is in progress

%%%%%%%%%%% OPCOM 18-MAR-2004 16:41:02.31 %%%%%%%%%%% (from node HERA at 18-MAR-2004 16:41:02.30) $1$DGA300: (HERA PGB, CRONUS) has been removed from shadow set.

This weekend to find out why what broke, did.

Now I know why vraid1 is the default option. Disks are cheap - wine drinking time is dear.

John

[boputnam]

Originally posted by John Nebel
...The three AH volumes - vBulletin, web, and ftp - fell over onto the surviving copy - that much was supposed to happen. The interesing bit is the the controller then reestablished redundancy on the remaining disks since they had enough free space....
%%%%%%%%%%% OPCOM 18-MAR-2004 16:40:39.70 %%%%%%%%%%% (from node HERA at 18-MAR-2004 16:40:39.68) Device $1$DGA300: (HERA PGB, CRONUS) is offline. Mount verification is in progress

%%%%%%%%%%% OPCOM 18-MAR-2004 16:41:02.31 %%%%%%%%%%% (from node HERA at 18-MAR-2004 16:41:02.30) $1$DGA300: (HERA PGB, CRONUS) has been removed from shadow set....

Reminds me of that dog cartoon, where owner is going on-and-on and all the mutt hears is...

"nipper"

You, sir live in a very strange world. I now am begining to believe you can read the Matrix code as it runs down the screen. And, you have yet to pleasure us with photos of your incredible set-up - the JBL's, that is...

[Hofmannhp]

Originally posted by Don McRitchie
They do more than that. For those that aren't aware, John hosts our entire site at no cost to us. This is a very considerable contribution. ......John and Ann have been invaluable in maintaining and supporting this site.

Hi All,

thats a fine job John is doing here for zero bucks.....I can imagine that John is good for some forum members donations, after the job for Don (the speaker project) is done.

HP

[John Nebel]

HP

Thanks, but it's better direct funds to the general good through the mechanism established by Don.

I'm doing it for the fun of it. The pics were posted because we are, how does one say this, somewhat or maybe somewhat, crazy and the pics seemed to fit in.

That was an intentional understatement.

The stuff about disks does have me a little baffled and it is curious to watch these things which have small minds of their own. Rest assured that I DON'T TRUST THEM and I don't believe the manufacturer's representations and there is backup strategy.

Merely having a 2nd array sitting next to the first is not enough - one has to be prepared to give up the entire concept and use something old fashioned and slower and more reliable if need be and I was certainly thinking of that yesterday while watching the automatic processes play out and wondering what the hell was to happen next.

John

[Hofmannhp]

ok John,

I like to see how it works with your machines, between the JBL stuff.
BTW ..In which RAID level do you use the disks? and what kind of controler is used?

HP