AOA Forums AOA Forums AOA Forums Folding For Team 45 AOA Files Home Front Page Become an AOA Subscriber! UserCP Calendar Memberlist FAQ Search Forum Home

Go Back   AOA Forums > Software > OS, Software, Firmware, and BIOS > Linux

Linux Questions and information concerning Linux

LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old 11th November, 2010, 04:21 AM
Gizmo's Avatar
Chief BBS Administrator
BassTeroids Champion, Global Player Champion, Aim & Fire Champion, Puzzle Maniax Champion, Othello Champion, Canyon Glider Champion, Unicycle Challenge Champion, YetiSports 9: Final Spit Champion, Zed Champion
Join Date: May 2003
Location: Webb City, Mo
Posts: 16,178
Send a message via ICQ to Gizmo Send a message via AIM to Gizmo Send a message via MSN to Gizmo Send a message via Yahoo to Gizmo Send a message via Skype™ to Gizmo

Problems recovering data from Mylex controller

So, I've got a system that was running on Windows 2000 for 8 years. It finally died about 2 years ago, but I kept the drives because there was some data on them that I wanted to keep, and I assumed the problem was just a corrupted file system due to a power failure. The system was using 2 18 GB IBM drives (DDYS-T18350) running on a Mylex AcceleRAID 250 SCSI controller (also known as the DAC960-PLT1) in a RAID 1 configuration (mirror).

I finally decided a couple days ago that it was time to scrap this hardware, but I needed to recover the data, so I slapped the controller and 1 of the drives into my Linux box and tried to recover the data.

No go. Well, kinda. The controller was still working, and it was talking to the drive, but I was only getting like 20K/sec transfer rates. So I thought, "Well, ok, maybe there's something wrong with the drive", pulled it out, slapped the other drive in, same thing. I go pull a spare drive off the shelf: same thing. Ok, so maybe there's some sort of bizarre issue with the drive and the controller. So I grab a Seagate Cheetah ST118202LC and plug it in. Same problem. Hmm.......bad cables? Nope, swap the cable, same problem. Bad terminators? Nope. Controller funky? Well, that's possible, but seems unlikely. Usually, with these things it either works or it's dead. But what the heck. I try different SCSI modes ranging from 5 MHZ to 40 MHz signaling rates, and asynchronous mode, and both 8 and 16-bit bus widths. Same deal.

Finally, I get to wondering "Maybe it's a driver issue?". The drive I'm booting from is running Fedora 14. Redhat does a good job of providing a good set of drivers to boot most any hardware out there. Unfortunately, very occasionally you run across a hardware combination that results in driver conflicts, and either the wrong driver gets loaded, or it gets loaded in the wrong mode. Being suspicious that this was the case, I proceeded to take my trusty Gentoo system (which has ONLY the drivers I need to make it boot) and recompile the kernel to add Mylex support.

Booted the system up, found the drive, and everything worked great.

Moral of the story: having all of the drivers in the world is great, but there's something to be said for 'lean and mean'. I still don't know exactly what the problem was with Fedora, but Gentoo came through for me.

To be fair, I could have compiled a custom Fedora kernel too but with Gentoo being a source distro, I was already set up with everything I needed to recompile the kernel whereas on Fedora I wasn't.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #2 (permalink)  
Old 12th November, 2010, 01:54 AM
Join Date: April 2005
Location: AZ
Posts: 2,446

I have always run a lean system, used to be I would do it for the performance value, now it's just so I can run CLI apps that are harder to break with updates.

Right now I'm fighting a USB transfer speed problem in Arch Linux. The problem is not there in Gentoo even though both installs are very close to being the same, same kernel, same kernel config, same version of base packages.
Biostar TForce X58 - Core i7 920 - 12GB Corsair Dominator DDR3 - EVGA 560ti - PCP&C 750W - Dual boot, Arch Linux/WinXP
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #3 (permalink)  
Old 12th November, 2010, 05:05 AM
dsio's Avatar
Steve Jobs
Join Date: October 2002
Location: Brisbane, QLD, Australia
Posts: 8,037

In fairness Gizmo, you and RAID controllers have never really seen eye-to-eye in the past.

Hey... post #8000
Notebook: Apple Macbook Pro 13" i7 2.7Ghz (3.4Ghz max) 8GB DDR3 1333Mhz (Mac OSX 10.6.7)
Desktop: ASUS Rampage Formula X48
Intel Core 2 Quad Q9450 (Yorkfield) @ 3.60Ghz (Folding SMP Linux)
Running Fedora 15 Linux (GNOME 3)
Dual Dell 2407WFP
AOA Team fah

Drivers, Games, Demos, Mods and Overclocking Tools At AOAFiles

Last edited by dsio; 12th November, 2010 at 05:06 AM.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
PS3 controller in 360 Controller case? Okie, dokie! raphael2040 Case Modifications 3 1st May, 2007 09:10 AM
Problems with Data/DVD Burning causing Lag on OS woodeirl OS, Software, Firmware, and BIOS 1 8th December, 2006 01:39 PM
Recovering Lost Savegame IceRaptor GAMES! OH YEAH! 5 13th July, 2005 03:33 PM
Data corruption/boot problems on 8kha+ goofee EPoX MotherBoards 0 12th June, 2002 05:23 PM
Anybody have problems with the secondary IDE controller on their MSI Pro-2A TranceBear AMD Motherboards & CPUs 4 1st January, 2002 11:08 AM

All times are GMT +1. The time now is 12:42 AM.

Copyright ©2001 - 2010, AOA Forums
Don't Click Here Don't Click Here Either

Search Engine Friendly URLs by vBSEO 3.3.0