mongodb - EC2 Volume Attachment Error (Unix) -

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i trying follow 10gen documentation standing mongodb on ec2 instance. encountering error when trying attach newly created volumes instance.

i trying run command

$ ec2-attach-volume vol-dac9c92f  -i i-19f359db -d /dev/sdh2

the error receive following

client.invalidparametervalue: value (/dev/sdh2) parameter device invalid. /dev/sdh2 not valid ebs device name.

and relevant part of documentation this

$ (i=0; \ > vol in $(awk '{print $2}' vols.txt); \ >   i=$((i+1)); \ >   ec2-attach-volume $vol -i i-11eee072 -d /dev/sdh${i}; \ > done)

this command executes (notice absence of id number)

$ ec2-attach-volume vol-dac9c92f  -i i-19f359db -d /dev/sdh

if point out may doing wrong appreciative.

-james

the device attached instance mapped different device name based on type of virtualization.

if instance pv (paravirtual), volumes can mapped /dev/sdxy x device letter , y numeric (as used partitions) - can use /dev/sdh2.

however, hvm instances, y numeric format not acceptable - needs volume id without partition number naming syntax, i.e. /dev/sdh, /dev/sdi, etc.

http://docs.aws.amazon.com/awsec2/latest/userguide/device_naming.html - see "recommended values ebs volumes" column.

* edit * provide bash snippet hvm instances equivalent of:

$ (i=0; \ > vol in $(awk '{print $2}' vols.txt); \ >   i=$((i+1)); \ >   ec2-attach-volume $vol -i i-11eee072 -d /dev/sdh${i}; \ > done)

you can use letter-based incremental loop (set volmap set / array of letters f through i , iterate through array, instead of incrementing counter)

$ (volmap=({f..i}); i=0; \ > vol in $(awk '{print $2}' vols.txt); \ >   ec2-attach-volume $vol -i i-11eee072 -d /dev/xvd${volmap[i++]}; \ > done)

this attach /dev/xvdf through /dev/xvdi. have used xvdx instead of sdx aws volume attachment matches kernel addressing of devices.


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