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I have an Asus Zenbook with a "hybrid" drive, that is, it has a 24GB SSD and a 500GB HDD. The HDD holds the UEFI-part, /boot, swap and /home while the SSD is /.
Today, I started to get strange "Input/Output error"-messages for any command that wasn't already in memory; for example, "ls" would work as I had used it previously, "dmesg" wouldn't. I tried to shutdown the laptop properly, but that wouldn't work,
Now when I try to boot the laptop, it takes ages to get to either the BIOS or grub2. BIOS sees the SSD on a separate SATA channel, but when I try to boot with grub I get a few "COMRESET failed errno=-16" messages, after it tells me it cannot find /dev/disk/by-uuid/$UUID-OF-ROOT-DRIVE. I can continue from there, but obviously without a working root it fails.
I'm typing this from a Ubuntu USB stick - /dev/sda* is there (the HDD) and everything seems to be in order. /dev/sdb(1) is there are well, that's the USB stick. There's also /dev/sdc (no numbers), but trying to run cfdisk on it returns "FATAL ERROR: Cannot open disk drive" while gparted says "Error opening /dev/sdc: No medium found".
So I'm guessing the drive is dead, as strage as it is (this laptop is only a few months old), but any ideas how to fix it if possible are more than welcome.
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Take a look at this thread and you can come back if you're still experiencing the problem :
"T420 won't boot from SSD with GPT" @ https://bbs.archlinux.org/viewtopic.php?id=117302
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Sorry, that really doesn't apply. The laptop worked fine for a few months, now it just seems that /dev/sdc (well, that'd be /dev/sdb if I didn't run from USB) is gone/nonfunctional. That, and the fact that it takes like a minute to get to the BIOS or grub tells me that it's probably time to take it back to the shop.
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Probably not the same issue but I just dealt with some Input/Output errors on my SSD as well. Upgrading the firmware fixed the issue. Something worth looking into.
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