New answers tagged hard-drive
While there might be an answer that gets you the info in the OS, odds are the controller firmware can tell you if you access it during boot. Another thing I noticed in your cut and paste is that your battery says "failed". I wonder if the stripes are reporting failure because the Write Cache battery is toast? Though it reporting and actual bad inode would ...
Based on the end_request: critical target error, dev sda, sector 556782970 line, I assume that /dev/sda is the trouble child. You can find the serial number of that device using: ls -l /dev/disk/by-id | grep "sda$"
Your math is off, but your conclusion is correct. The chance of losing a RAID1 volume is not the chance of any two commodity drives failing in a given year, it's the chance of two commodity drives failing at about the same time, which is much less likely. Yes, EBS is less reliable than R1.
As it turns out, this behaviour was caused by a starving HDD - which was the replaced one. I didn't get it because the second server recognized the new HDD without problems, but maybe this was the last breath of this virgin harddrive. I didn't expected a defect on arrival by data-center grade HDDs (WD RE series, before you ask), I will be aware of it in the ...
How often you should scan depends on a lot of things. Age of the disks. The older they are, the more likely they are to contain evil. The original quality of the disks in question. Stuff sold as 'enterprise' is more likely to last error-free, and the 1+TB size disks of 2014 are a lot more reliable than their 2009 equivalents were when they shipped. How ...
I know this is old, but just in case someone is still reading this post: "DD will also try to read the broken sector(s)" - gddrescue is useful here. It doesn't (okay, it does, but only once).
If you can't get a rack (and if you live in any populated area and have a pickup truck you can probably find free if you do all the heavy lifting) the next best option is shelves. Heavy duty shelves enough for each server to sit on its own. Make sure they are actually rated for the weight of the servers. Servers are heavy. Make sure they are bolted to ...
Terrible idea - what do you do if/when you need to get inside one of the servers? how are you going to do the cable-management? This is a site for PROFESSIONAL sysadmins, who inherently wouldn't even consider this.
I have been using 3TB drives in my PERC 6i servers for quite a while. They work great and you gain about 400 gb over using 2TB drives due to formatting. I use them in a raid 5 array, so 3 drives create exactly a 4TB array. If I was using 2TB drives, i would get about 3.6TB in the formatted array. Remember, the limit is 2.2TB, so i gain a small percentage. ...
Hard drives can die randomly and suddenly. SMART helps identify the ones that die slowly, but not the ones that die quickly. When 'beginning to fail' and 'completely dead' are seconds apart, there is no warning. If you are concerned about corrupt data going unnoticed you should use a hardware RAID solution that has a media patrol type feature which ...
Use a filesystem which is capable of detecting and repairing corruption, such as ZFS or btrfs, or Windows ReFS.
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