>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-centos at irrigacion.gov.ar>: > On Wed, Mar 14, 2018 at 4:27 PM, marcos sr <msr.mailing at gmail.com> 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 at centos.org > https://lists.centos.org/mailman/listinfo/centos >