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Re: [OT] 19"/2U Cases
Date: Thu Sep 13 2007 - 11:26:23 EDT
Sorry for the late answer, but some harddrives went crashed the same time
and I had to buy a new Array...
Am 2007-08-29 14:45:02, schrieb Michael Loftis:
> --On August 29, 2007 1:03:53 PM -0700 Mike Bird <mgb-debian@yosemite.net>
> wrote:
> >Although 3Ware website and 9xxx product data sheets still claim
> >support for JBOD, once you read the huge user manual you find that
> >JBOD support was discontinued in a firmware "upgrade". Single disk
Never uses "Just-A-Bunch-Of-Drives"...
> >mode is available but your data is still hidden behind the 3Ware
> >layer and unavailable without paying the 3Ware ransom. Which means
???
> >you have to go out and buy another overpriced 3Ware and keep it in a
> >cupboard so you can recover your data when the first controller dies.
In general I buy a new one if one is broken... Never used ¶Ware controller on Singel-Disks, except my Special-Server in my 4WD, which use two 12-Channel controllers and on each port a 4 GByte CF-Drive
> >Google will also show you many instances over the years of people
> >finding their 3Ware running at a tiny faction of advertised speed.
Never had speed problems with 3Ware and since I have only GBit-LAN, 3Ware controllers fullfill my requirements... My courier-imap is definitivly NOT the bottleneg because I get only 78 MByte/Sec
> >Never again 3Ware!
Chaqun son truck!
> >Buy an inexpensive OEM controller and use software RAID. Much more
> >reliable and often faster.
Wuahhhhh....!
> MDRAID certainly isn't reliable in a huge number of failure cases. It
> causes the machine to OOPS/lock up. Or even lose data. MDRAID is also
ACK
> very difficult to administer, offering only (depending on your version)
> mdadm or raid* tools. mdadm is rather arcane. simple operations are not
> well documented, like, how do i replace a failed drive? or start a
> rebuild? there's no 'rebuild drive' it's completely NON automated either.
And how to do HotSwap? -- Never figured it out how it works!
> meaning it always takes user intervention to recover from any failure. a
> single I/O error causes MDRAID to mark the element as failed. it does not
> even bother to retry. MDRAID is also incapable of performing background
> patrolling reads, something i think even 3Ware does. MDRAID RAID5 sets are
> non-bootable. Something you get from any hardware raid, evne 3Ware. My
> money lately has been on LSI's cards. 3Ware is a good second choice too.
> the newer ICP* modelled ICP controllers are shit (as opposed to the pre
> intel/adaptec GDT* series which are rock solid).
Appropos GDT... I have replaced a broken 3Ware with a NEW (!!!) GDT6128RD (bought in 04/2000) and Raidyne Firmware but I can not boot from my connected CD-532S or CDR-55S to install Etch...
Do you know, whats going on here?
Note: Also I can configure only Raid-0 or Raid-1 (including Hotfix) if
I have 5 Drives, but it does not let me select Raid-4 or Raid-5,
where I prefer Raid-5+Hotfix
> I can never recommend any software RAID for anything other than simple
> mirrors, and then, always, with the caveat that it will be a bitch to fix
> if things go wrong, you probably won't lose data, but getting a software
> raid running again is often arcane, especially with MDRAID and it's
> frequent inability to correctly identify a failed drive (sometimes the
> fault of the SATA controller mind you). BSDs vinum is little better in
> these regards. And god forbid you lose your boot drive and have forgotten
> to keep all the boot blocks on your spare properly updated. you also have
> to manually intervene and reorder drives in that case, something hardware
> raid, any hardware raid, will transparently cover.
Question 1:
If you have an 3Ware 3W950x with 8 channels and because financel problems you have only installed two Raid-1 (one on 0 and 1 and the second on 4 and 5) without Hotfix and want to add the Hotfix-drive no (later), how to do this?
Question 2:
The same shit as Question 1, but for the GDT6128RD... :-/
Thanks, Greetings and nice Day
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant
-- Linux-User #280138 with the Linux Counter, http://counter.li.org/ ##################### Debian GNU/Linux Consultant ##################### Michelle Konzack Apt. 917 ICQ #328449886 50, rue de Soultz MSN LinuxMichi 0033/6/61925193 67100 Strasbourg/France IRC #Debian (irc.icq.com)
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