SMART testing has been around for a while and isn’t very well understood. I can’t say that I’m an expert on it, but I’ve come to have several fairly well developed ideas in regards to it. First off, if I have a live hard drive that fails to complete a SMART test, it’s time for me to retire that drive. It may seem extravagant, but I would rather not have to spend loads of time recovering data of a potentially failing drive. It’s true that SMART is not necessarily going to raise a red flag before a significant data loss event happens. In fact, I’ve seen drives report that they’ve passed the health test in spite of some serious disk problems. What I think you ought to look out for are a few of these points:
Tag: smart
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Checking the SMART details of a hard drive with an Ubuntu Boot CD
S.M.A.R.T. is a self monitoring and reporting tool built into every modern hard drive. Did you know that you can use an ubuntu linux boot cd to check that smart status and run SMART tests on your drive? This is the same boot cd that you can use to test out or install the ubuntu linux environment, but you can do the SMART testing without installing linux on your hard drive.
How?
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Hard drive testing utilities
Windows users know chkdsk, linux users know fsck… users of each MIGHT have heard of SMART. These are different ways of TESTING hard drives. Well, there’s also a utility called TestDisk that looks promising for recovering data… Here’s the clip from their site. “free data recovery software! It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally deleting a Partition Table). Partition table recovery using TestDisk is really easy.” It runs under a variety of OS’s and recognizes several different disk formats.
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Booting from CD when a systems BIOS won’t let you
Along the way on my permissions nightmare last night, I made matters worse by changing permissions on a fairly important file. In order to fix that I was going to need to reboot from a boot disk. The only problem was boot floppys typically don’t come with reiserfs support (only the boot cds I’ve found have that.) AND my server has for some time refused to boot from the CD. Now, the BIOS will let you choose CD as the first boot device but it promptly decides that there is a “BIOS checksum mismatch” and reloads the defaults which leaves you booting from floppy, then hard drive…. Now, I’ve changed the CMOS battery twice within a 2 month span and I think the longest things lasted were about a week before it reverted to that “BIOS checksum mismatch” (For those of you smart enough to suggest I replace the CMOS battery.) Now, it could be that the battery I replaced with had expiired it’s shelf life already I suppose. But….
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Banks and Web security
George Ou has a good post on Banks cheating their way to meet web security guidelines. Many of the observations that he notes come from the Between the Lines column here and are SPOT ON. The biggest I see is related to “multifactor authentication”….
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Epson Perfection 1650 scanner and Windows XP Limited User account
“We tried scanning and all that happened was the lamp moved back and forth…. Nothing else happened.” That was the description I had and the request to see why the scanner was broken. It hadn’t been long since the Epson scanner had been hooked up to a new XP Pro system. The machine sees quite a bit of public use so we had thought it would be best to divide accounts into Visitor which is an unpriviliged user and another account for the ability to work with software that was not as cooperative in an unpriviliged account.