syncronizing mirror disks

[Carlos_172]

¿Is it possible to work (i/o writes and reads) on volume group than is syncronizing (vgsync) because one mirror disk failed?

Thanks a lot, folks.

[RAC_1]

Explain in details. I could not understant what you are trying to do.

[Robert-Jan Goossens_1 · Accepted solution]

is it possible to work on a system when vg00 is being synced ?

answer yesm it will be slower but you an work while a system is syncing its mirrors.

Regards,
Robert-Jan

[Carlos_172]

I replace a disk in a volume group that failed. This volume group have 4 disk in mirror (2 to 2). I'm synchronizing the volume group. While this process is running, users can work (i/o reads and writes) on this volume group?

[RAC_1]

Yes. Without problems. Before you resync, you will have to do following.

vgcfgrestore -n /dev/vgxx /dev/dsk/cxtxdx
vgchange -a y vgxx
vgsync vgxx

[Carlos_172]

OK. Thanks a lot. Another question is I run this process in foreground. Is any way to convert in background as I ran with "nohup" to I can close the telnet session?

[RAC_1]

As I understand, wether, you run it with nohup or not, LVM spawns another processes, which does syncing work.

[Carlos_172]

Then , if I close the session (sh) sync process will not finish and his father will be process number 1, isn´t it ?
But isn´t there a way to send process back whit "bg pid" command?

[RAC_1]

Start it in background.

nohup vgsync vgxx &

[Carlos_172]

I mean, if your process already running ...

[RAC_1]

If your processes is already running, you should be able to put in suspended mode first. (Assuming that you did not change stty settings. ^Z is default suspend. cntrl+Z)
Once you suspend it, (Chances are that it has already started LVM process in the background) check it with jobs command and then you would be able to do
bg "job_id"

[Carlos_172]

I can´t whith this keys. Is there another way using his pid?

[RAC_1]

Do you want to force a process to go into background? May be that is possible, but not without some strong C coding. What exactly makes you worry about it?

[Carlos_172]

Thans a lot