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[#] Sat Sep 19 2009 13:08:48 EDT from Ford II @ Uncensored

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A HA!
It turned out not to be my vm's that were holding the cd rom drive, but hddtemp.
Today I learned what fuser is. :-)
A real sysadmin I will never make.

[#] Tue Sep 22 2009 17:49:02 EDT from dothebart @ Uncensored

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http://etherboot.org/wiki/index.php

they've introduced gpxe, a pxe replacement, which also knows how to do DNS, HTTP and FTP instead of just the good old TFTP...

boot.kernel.org offers images to be downloaded and bootet instantly.



[#] Wed Sep 23 2009 10:30:32 EDT from IGnatius T Foobar @ Uncensored

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Great, *another* protocol that requires special boot ROM's.

PXELINUX is the right way to go. It lets you use stock PXE boot ROM's, and then it can chain load to whatever you want to do afterwards.

[#] Fri Sep 25 2009 13:59:50 EDT from IGnatius T Foobar @ Uncensored

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Here's a potentially tough Linux issue.

I recently moved my home server to new hardware. It's got a different SCSI chipset than the old hardware (Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI), but I took care of adding in the correct modules to the kernel before moving the hard disk over.

My tape drive isn't functioning properly. But it isn't throwing any errors!
There are no SCSI errors reported. dmesg says nothing of interest. Backups appear to be completing, but during the verify phase of my backup script, gunzip reports that it is receving a corrupted data stream.

What would cause the SCSI or SCSI Tape layers to deliver corrupt data without reporting an error?

[#] Sat Sep 26 2009 03:33:12 EDT from dothebart @ Uncensored

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methinks, most tapes are writeonly anyway.



[#] Sat Sep 26 2009 18:23:20 EDT from IGnatius T Foobar @ Uncensored

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I'm one of those rare people that actually tests every backup tape to make sure it contains a readable backup.

[#] Sun Sep 27 2009 07:41:31 EDT from fleeb @ Uncensored

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Have you tried using a fresher tape?  Is possible the medium itself is the problem?



[#] Sun Sep 27 2009 11:16:06 EDT from IGnatius T Foobar @ Uncensored

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Yup ... tried it with several different tapes.

[#] Sun Sep 27 2009 17:14:48 EDT from Ford II @ Uncensored

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What would cause the SCSI or SCSI Tape layers to deliver corrupt data

without reporting an error?

old crappy tape?

[#] Sun Sep 27 2009 17:17:04 EDT from Ford II @ Uncensored

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Yup ... tried it with several different tapes.

It's good to know we all think alike after all this time.
Not a single outside-the-box-thinker among us. :-)

While it is pretty damning that it worked before and not after the hardware change I'd guess that if none of the software is throwing any error information, then nothing is wrong there and something is wrong with the tape drive.
Is it possible that something got zotzed by the new hardwhere when it was hooked up?
Can you borrow another tape drive and make sure it's not that?

[#] Sun Sep 27 2009 17:17:32 EDT from LoanShark @ Uncensored

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who backs up to tape anymore, anyway? if the tape has decent capacity, it's exorbitantly expensive from what i've seen (not reviewed too recently.) cheaper and faster to backup to an external hdd.

[#] Mon Sep 28 2009 08:01:19 EDT from skpacman @ Uncensored

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tape is long-term storage if you know what you're doing. hard drive failure rate is much higher than tape-backup.

our IT department still uses tape backups for our critical data (user accts, designs, network drives, etc...) but the rest is backed up on an extensive raid system.

It depends on how critical your data is and how fast you want to access it later. If access time is no issue than i suggest tape backup. Also for long-term storage without data change, use tape. if you're going to be accessing your backup data on a daily basis and need quick access to it at moment's notice, go with hdd raid systems.



[#] Mon Sep 28 2009 09:36:23 EDT from dothebart @ Uncensored

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doing it the complicated way:

http://www.ghacks.net/2009/09/25/manage-your-ssh-connections-with-secpanel/


--wish(11843)-+-gnome-terminal(11873)-+-gnome-pty-helpe(11874)
|                       |-sh(11875)---ssh(11876)
|                       `-{gnome-terminal}(11877)
|-ssh-add(11856)
`-{wish}(11844)

no, it doesn't edit .ssh/config, its doing its own.

~/.secpanel$ find
.
./config
./.init
./history
./.runfiles
./profiles
./profiles/home.profile

....

 



[#] Mon Sep 28 2009 09:53:47 EDT from IGnatius T Foobar @ Uncensored

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Yes, I still do tape backups, because I have a relatively small amount of data. All of the important stuff on my public server (such as Citadel data) is rsync'ed nightly to my home server, which is then backed up to tape.

I haven't yet decided what to do with my home videos. They won't fit on tape. And my photo library is on the verge of getting too big as well.

That having been said, though, I'm probably going to switch back to my old server hardware. This one has just got too many problems. Not just the tape issue, but one of the drive bays seems to be wonky (a disk problem went away when I moved it to another bay), and this morning the whole damn thing just locked up completely. It wouldn't accept my FXO card, so I had to move to an outboard analog gateway for the phone connection, and I've never been able to boot any type of removable media (the installation was done by bit-copying my boot drive from the previous machine).

It was free hardware, and better than what I had, but I really want my home server to just do its job and get out of my way, so all of this extra maintenance really misses the point.

[#] Mon Sep 28 2009 10:51:09 EDT from IGnatius T Foobar @ Uncensored

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I wasn't even aware that there was such a thing.

Ok, so I did a quick Google search, and it seems that my "mt" doesn't know about the command to toggle or query compression.

In any case, I don't see why applying two layers of compression would create a corrupt data stream, even if it were suboptimal.

[#] Mon Sep 28 2009 11:29:18 EDT from LoanShark @ Uncensored

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Sep 28 2009 8:01am from skpacman @uncnsrd
tape is long-term storage if you know what you're doing. hard drive failure

rate is much higher than tape-backup.

I don't buy that. We're talking about an external hdd that spends most of its lifespan powered down.

[#] Mon Sep 28 2009 13:19:28 EDT from IGnatius T Foobar @ Uncensored

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I would imagine that frequent power ups and power downs would reduce the lifespan of a disk drive, due to thermal expansion and contraction.

I've got a Biggie(tm) disk (got it off the dollar menu at Wendy's, dontcha know) that I had originally bought for my old TiVo. With a proper USB enclosure it would make a decent backup drive.

[#] Mon Sep 28 2009 14:34:05 EDT from skpacman @ Uncensored

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Mon Sep 28 2009 11:29:18 AM EDT from LoanShark @ Uncensored  

I don't buy that. We're talking about an external hdd that spends most of its lifespan powered down.


"external" changes the situation.

an external hdd, depending on data stream (usb, firewire, network, etc), power source (battery, ac adapter, usb cable, etc) and uptime, will be more reliable and often faster than tape or internal hdd. I've seen some external raid setups from BigCompany(tm) for $Expensive.00 that'll be a bit overkill for home server use but if you want extreme reliability and integrity go ahead.

I'll look it up and let you know.. im not a big fan of tape-backup either.



[#] Mon Sep 28 2009 14:35:54 EDT from IGnatius T Foobar @ Uncensored

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I've got a USB-IDE enclosure on hand, but it's got a Genesys GL811E chipset.
It's toasted two drives already, and someone mentioned once that that chipset is known to cause permanent hardware damage, but I'm trying to look it up now and can't seem to find any references.

[#] Mon Sep 28 2009 14:36:39 EDT from skpacman @ Uncensored

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http://www.tomshardware.com/reviews/external-raid-storage,1922.html

check that out for backups

might save you some time



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