my raid 1 array has been running with a dead drive for 3 years now!

[goontron]

i have not read the mdadm logs for 3 years and a drive failed 3 months after i built the array.
so can running a bad drive on RAID 1 for 2 years and 9 months damage anything?

[Mad_Professor]

Re: my raid 1 array has been running with a dead drive for 3 years now!

NO, assuming the good drive is actually good and hasn't done data corruption, you should be fine, replace drive and rebuild.

[ratdude747]

Re: my raid 1 array has been running with a dead drive for 3 years now!

Maybe I should check mine... it's a 2 drive 3ware RAID 1 array.

[Uranium-235]

Re: my raid 1 array has been running with a dead drive for 3 years now!

well OP you're running linux raid and it all depends on how the drive dies, usually you're ok

rat, you're running hardware raid, most decent cards will begin beeping if a failed drive is detected

[smason]

Re: my raid 1 array has been running with a dead drive for 3 years now!

MDADM should have emailed you about it.

[Uranium-235]

Re: my raid 1 array has been running with a dead drive for 3 years now!

not everyone puts a real email address when they setup linux, usually its just root@localhost unless its a business server

[gerg]

Re: my raid 1 array has been running with a dead drive for 3 years now!

OP your fine if it's been dead that long and you haven't had any issues your other drive is fine. personally I have to pay attention to my raids very closely I have a hard drive that is immenint failure over 100 miles away today that someone is running for. Can't risk data loss in my profession.

RD try out 3dm2 it should work on your card I don't remember the version you are running

http://www.3ware.com/support/downloa...9500S%20Series

[goontron]

Re: my raid 1 array has been running with a dead drive for 3 years now!

oops its not a bad HDD, the SATA power cable burnt up. plugged the bad drive in today and it spun rite up and i could access the data from before it failed! even got some data back that was deleted but wasn't supost to be.

oh and is this RAID card a P.O.S?

[Uranium-235]

Re: my raid 1 array has been running with a dead drive for 3 years now!

general rule, if its under ~$150, its fakeraid

that is a via chipset, and I can guarantee you, you're better with software linux raid

[goontron]

Re: my raid 1 array has been running with a dead drive for 3 years now!

like MDADM?http://en.wikipedia.org/wiki/Mdadm

[Uranium-235]

Re: my raid 1 array has been running with a dead drive for 3 years now!

well mdadm is the monitoring and management for linux software raid partitions, but yes, keep using Software, instead of fake raid

[Mad_Professor]

Re: my raid 1 array has been running with a dead drive for 3 years now!

general rule, if its under ~$150, its fakeraid

that is a via chipset, and I can guarantee you, you're better with software linux raid

YEP! Truth.

like MDADM?http://en.wikipedia.org/wiki/Mdadm

well mdadm is the monitoring and management for linux software raid partitions, but yes, keep using Software, instead of fake raid

mdadm or zfs works great since most processors are dual core or more and can handle the extra cycles.

Personally I've been using zfs on linux.
http://zfsonlinux.org/

You have to compile and install it as a kernel module once that's done you're good to go, you need to have raw disks with no partitions or anything, zfs handles all that. ZFS on linux is getting a lot of support, so I don't see it slowing down or becoming abandon-ware.

The other one is zfs-fuse, it has to run in the user space, which is annoying but works.

[cheapie]

Re: my raid 1 array has been running with a dead drive for 3 years now!

Still no love for LVM these days?

[Mad_Professor]

Re: my raid 1 array has been running with a dead drive for 3 years now!

Still no love for LVM these days?

yeah but LVM can't do raid 5/6, 10, 0+1 or do triple parity*ZFS* and lvm can be a bit complicated when you need it to do a certain action or setup. Not too mention I chose not to use it again when I found out it didn't have write barriers until 2.6.33 which are needed to stop filesystem corruption, I found out the hard way.

I have seen admins and users use LVM on top of mdadm successfully which is pretty much what ZFS and btrfs is except for the checksumming, self-healing, arc cache devices, De-duplications, diffs and dumps, encryption and few other things.

[Elysarian]

Re: my raid 1 array has been running with a dead drive for 3 years now!

This thread has just reminded me that I have a Compaq Smart Array card sitting around doing nothing - I really ought to instal it in the server I have that's currently sitting in a corner with an Adaptec 2930 controller in it...

[goontron]

Re: my raid 1 array has been running with a dead drive for 3 years now!

YEP! Truth.





mdadm or zfs works great since most processors are dual core or more and can handle the extra cycles.

Personally I've been using zfs on linux.
http://zfsonlinux.org/

You have to compile and install it as a kernel module once that's done you're good to go, you need to have raw disks with no partitions or anything, zfs handles all that. ZFS on linux is getting a lot of support, so I don't see it slowing down or becoming abandon-ware.

The other one is zfs-fuse, it has to run in the user space, which is annoying but works.

i prefer software raid anyway, much better to work with if you ask me.

[severach]

Re: my raid 1 array has been running with a dead drive for 3 years now!

Software RAID is good for the modes where the cost difference between software and hardware is nil. That's RAID 0,1,10 all of which can use DMA transfers directly to user memory. Little is gained by adding a hard card in the middle of the transfers. Softraid fakeraid Raid (F) 5 is slow because the DMA transfer must go to the RAID driver memory to be processed then copied out to user memory.

[shovenose]

Re: my raid 1 array has been running with a dead drive for 3 years now!

Linux software RAID is fine for casual use however for a VPS node that has 30 customer's servers raping the disks 24/7 hardware RAID is a must