There are not many things I miss from Mac OS 9. Force war-demo(0.2) mac os. But there's one that was really useful: the ability to test a hard drive surface. OS 9 disk formatter (I don't even recall it's name) had a 'Test Disk' option that would perform a surface scan of the selected hard drive. That was awsome to test for bad blocks on the drives.
Few things give Mac users that sinking feeling more than the sight of a spinning color wheel, rainbow wheel, spinning beach ball of death or SBBOD as it's also commonly known. It's official name is the Spinning Wait Cursor, and it's a system indicator. Signifies that macOS cannot handle all the tasks given to it at this moment. The 1.3.2 version of Rainbow Blocks for Mac is available as a free download on our website. Our built-in antivirus scanned this Mac download and rated it as 100% safe. This Mac application is a product of Alteru Inc. The following versions: 1.3 and 1.2 are the most frequently downloaded ones by the program users.
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- Rainbow beach ball: This is the most common wait cursor you'll see because it's the standard in OS X. If an application can't handle the events it receives and doesn't respond for 2-4.
- One of the most common symptoms of a failing hard drive are bad blocks, also known as bad sectors. A block or a sector is a unit of measurement used to break up your hard drive. A standard block is going to be 512 to 4,000 bytes depending on your drive, and a 1TB hard drive will hold around 21,474,83,648 blocks.
Unfortunately, that's impossible to do with Mac OS X, at least with it's built-in software. There are some commerical applications to do that (like TechTool Pro), but I get a little pissed off when I have to spend a lot of money buying a software that does a zillion things when all I want is surface scans, and specially when I could do it with the 'old' OS and not with the new powerful UNIX-based one. 7bit casino no deposit bonus.
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Well, Linux has the badblocks command that will do just that: test the disk surface for bad blocks. It's a simple UNIX command, so I thought there must be a port of that to OS X (and, of course, I could try to compile it in OS X as last resource). After some googling, I found out badblocks is part of the ext2fs tools. And, fortunately, Brian Bergstrand has already done the port to OS X, including a nice installer.
The installer installs all the ext2fs stuff, including an extension that will allow you to access ext2fs volumes on OS X. As always, this is a somewhat risky operation. Personally, I avoid as many extensions as I can, because they run too close to the kernel for me to feel confortable. So, if possible, install it on a secondary OS (like an utility/recover system on an exteral hard drive, or so).
The badblocks command will be installed in /usr/local/sbin/badblocks, and it will probably not be on your PATH, so you have to type the entire path when using, or edit your PATH environment variable.
Usage is simple. First, run the 'mount' command, so that you know the device names for the drives you want to test. You can obtain something like this:
arroz% mount
/dev/disk0s3 on / (local, journaled)
devfs on /dev (local)
fdesc on /dev (union)
on /.vol
automount -nsl [142] on /Network (automounted)
automount -fstab [168] on /automount/Servers (automounted)
automount -static [168] on /automount/static (automounted)
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The internal hard drive is /dev/disk0 (note that /dev/disk0 is the entire drive, /dev/disk0s3 is a single partition). Imagining you want to test the internal hard drive you would type the command (as root):
badblocks -v /dev/disk0
This would start a read-only test on the entire volume. The -v is the typical verbose setting, so you may follow what's happening. This will take a long time, depending on the hard drive you use. For a 160 GB hard drive, it took between 2 and 3 hours in a G5 Dual 2 Ghz.
I mention this because time is an important factor when testing hard drives! 7spins casino no deposit bonus. You should run badblocks on a known-to-be-in-good-condition hard drive, so that you can get the feeling of how fast (or slow) badblocks is. Later, if you test a possibly failing hard drive, and badblocks progresses notably slower, it will probably mean that the hard drive is in bad condition (even if it doesn't have badblocks).
After running the command, you may get two results: your disk has, or hasn't badblocks! Scott the scout mac os. 🙂 You will see many outputs of a successful surface scan, so I leave here an example of a not-so-successful one:
/usr/local/sbin arroz$ sudo ./badblocks -v /dev/disk0
Password:
Checking blocks 0 to 156290904
Checking for bad blocks (read-only test): 120761344/156290904
120762872/156290904
120762874/156290904
done
Pass completed, 3 bad blocks found.
This is the result of a test on a 160 GB hard drive with 3 bad blocks.
After getting something like this, you may try to run badblocks again, in write mode.After running the command, you may get two results: your disk has, or hasn't badblocks! Scott the scout mac os. 🙂 You will see many outputs of a successful surface scan, so I leave here an example of a not-so-successful one:
/usr/local/sbin arroz$ sudo ./badblocks -v /dev/disk0
Password:
Checking blocks 0 to 156290904
Checking for bad blocks (read-only test): 120761344/156290904
120762872/156290904
120762874/156290904
done
Pass completed, 3 bad blocks found.
This is the result of a test on a 160 GB hard drive with 3 bad blocks.
After getting something like this, you may try to run badblocks again, in write mode.