Buffer I/O error and print_req_error

Issues related to hardware problems
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AleksandrKhviasko
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Joined: 2020/05/02 09:56:27

Buffer I/O error and print_req_error

Post by AleksandrKhviasko » 2020/05/02 10:04:56

Good afternoon.
I have Centos 8 Minimal installed on a hyper-v virtual machine. I get errors below. Help me please. What should I do?

12:29 Buffer I/O error on dev sr0, logical block 1, async page read kernel
12:29 Buffer I/O error on dev sr0, logical block 0, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 0 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 7, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 7 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 6, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 6 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 5, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 5 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 4, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 4 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 3, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 3 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 2, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 2 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 1, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 1 flags 0 kernel
12:29 Buffer I/O error on dev sr0, logical block 0, async page read kernel
12:29 print_req_error: I/O error, dev sr0, sector 0 flags 0 kernel

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TrevorH
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Re: Buffer I/O error and print_req_error

Post by TrevorH » 2020/05/02 10:09:24

It's telling you that it's unable to read whatever is in the "CD/DVD" drive on that VM. You should verify if the iso image or physical device that is attached to it is functioning correctly.
CentOS 6 will die in November 2020 - migrate sooner rather than later!
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 is dead, do not use it.
Full time Geek, part time moderator. Use the FAQ Luke

AleksandrKhviasko
Posts: 3
Joined: 2020/05/02 09:56:27

Re: Buffer I/O error and print_req_error

Post by AleksandrKhviasko » 2020/05/02 10:37:17

But I don’t have anything in the “CD / DVD”. I have now deleted the "CD / DVD" from the virtual machine. Errors have stopped yet

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TrevorH
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Re: Buffer I/O error and print_req_error

Post by TrevorH » 2020/05/02 12:41:18

Well /dev/sr0 is your virtual optical drive inside the VM. It's trying to access it and getting errors so it presumably thinks there is media in it and that it's corrupt.
CentOS 6 will die in November 2020 - migrate sooner rather than later!
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 is dead, do not use it.
Full time Geek, part time moderator. Use the FAQ Luke

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