Re: [CentOS] ISCSI target + LVM Problem

[marcos sr]

>Ok. [Try not to top-post]
>
>Let's try to read your disks (replace /dev/sdX with the name of the iscsi
disk):
>
>dd if=/dev/sdX count=1 >/dev/null
>
>dd if=/dev/sdX count=1024 >/dev/null
>
>(please, copy the output and error(s))


I'm using gmail and searching on google i did not find how to not top-post.
:(
Sorry i'm new on mailists.


Thanks for your patience.

I have 2  Physical volume(in a ISCSI mounting a Volume group. For some
reason the server lost communication with iscsi and when it backs the lvm
"crash" with i/o error.
And when i try to remount i ger the error:

mount: you must specify the filesystem type

When i run the pvdisplay i get the following erro:

read failed after 0 of 4096 at 0: Input/output error


I run commands for boths disks.

dd if=/dev/sdf count=1 >/dev/null
1+0 registros de entrada
1+0 registros de saída
512 bytes (512 B) copiados, 0,00208968 s, 245 kB/s

dd if=/dev/sdg count=1 >/dev/null
1+0 registros de entrada
1+0 registros de saída
512 bytes (512 B) copiados, 0,00203979 s, 251 kB/s

dd if=/dev/sdf count=1024 >/dev/null
1024+0 registros de entrada
1024+0 registros de saída
524288 bytes (524 kB) copiados, 0,0457182 s, 11,5 MB/s

dd if=/dev/sdg count=1024 >/dev/null
1024+0 registros de entrada
1024+0 registros de saída
524288 bytes (524 kB) copiados, 0,0163593 s, 32,0 MB/s


But if i run *mkfs* i'll lost all data?




2018-03-14 16:35 GMT-03:00 Marcelo Roccasalva <
marcelo-cen...@irrigacion.gov.ar>:

> On Wed, Mar 14, 2018 at 4:27 PM, marcos sr  wrote:
> > Hello, thanks for the help.
> >
> > Yes
> >
> > And the commands to discovery iscsi results ok
> >
> > Such
> >  iscsiadm --mode discovery --type sendtargets
> >
> > And
> >
> > scsiadm -m node -T
> >
> > And the disks appear on pvdisplay
>
> Ok. [Try not to top-post]
>
> Let's try to read your disks (replace /dev/sdX with the name of the iscsi
> disk):
>
> dd if=/dev/sdX count=1 >/dev/null
>
> dd if=/dev/sdX count=1024 >/dev/null
>
> (please, copy the output and error(s))
>
> --
> Marcelo
>
> "¿No será acaso que esta vida moderna está teniendo más de moderna que de
> vida?" (Mafalda)
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
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Re: [CentOS] ISCSI target + LVM Problem

[Marcelo Roccasalva]

On Wed, Mar 14, 2018 at 4:27 PM, marcos sr  wrote:
> Hello, thanks for the help.
>
> Yes
>
> And the commands to discovery iscsi results ok
>
> Such
>  iscsiadm --mode discovery --type sendtargets
>
> And
>
> scsiadm -m node -T
>
> And the disks appear on pvdisplay

Ok. [Try not to top-post]

Let's try to read your disks (replace /dev/sdX with the name of the iscsi disk):

dd if=/dev/sdX count=1 >/dev/null

dd if=/dev/sdX count=1024 >/dev/null

(please, copy the output and error(s))

-- 
Marcelo

"¿No será acaso que esta vida moderna está teniendo más de moderna que de
vida?" (Mafalda)
___
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Re: [CentOS] ISCSI target + LVM Problem

[marcos sr]

Hello, thanks for the help.

Yes

And the commands to discovery iscsi results ok

Such
 iscsiadm --mode discovery --type sendtargets

And

scsiadm -m node -T

And the disks appear on pvdisplay


2018-03-14 16:23 GMT-03:00 Marcelo Roccasalva <
marcelo-cen...@irrigacion.gov.ar>:

> On Wed, Mar 14, 2018 at 4:08 PM, marcos sr  wrote:
> >
> > Hello,
> >
> > I have a LVM with 2 ISCSI disk mounted. The partition started presents
> > problem such " i/o error". I unmounted the device, and restarted target
> > server in scsi, wich as having some problems. After that i mapped iscsi
> and
> > trying to mount partition again but:
> > When i run the pvdisplay i get the following erro:
> >
> > read failed after 0 of 4096 at 0: Input/output error
> >
> > And cannot mount partition.
>
> First the very basic:
>
> Can you ping the target (iscsi server)?
>
> Is the target in your iscsi target list: "iscsiadm -m session"?
>
> --
> Marcelo
>
> "¿No será acaso que esta vida moderna está teniendo más de moderna que de
> vida?" (Mafalda)
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
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Re: [CentOS] ISCSI target + LVM Problem

[Marcelo Roccasalva]

On Wed, Mar 14, 2018 at 4:08 PM, marcos sr  wrote:
>
> Hello,
>
> I have a LVM with 2 ISCSI disk mounted. The partition started presents
> problem such " i/o error". I unmounted the device, and restarted target
> server in scsi, wich as having some problems. After that i mapped iscsi and
> trying to mount partition again but:
> When i run the pvdisplay i get the following erro:
>
> read failed after 0 of 4096 at 0: Input/output error
>
> And cannot mount partition.

First the very basic:

Can you ping the target (iscsi server)?

Is the target in your iscsi target list: "iscsiadm -m session"?

-- 
Marcelo

"¿No será acaso que esta vida moderna está teniendo más de moderna que de
vida?" (Mafalda)
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[CentOS] ISCSI target + LVM Problem

[marcos sr]

Hello,

I have a LVM with 2 ISCSI disk mounted. The partition started presents
problem such " i/o error". I unmounted the device, and restarted target
server in scsi, wich as having some problems. After that i mapped iscsi and
trying to mount partition again but:
When i run the pvdisplay i get the following erro:

read failed after 0 of 4096 at 0: Input/output error

And cannot mount partition.
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