There are a number of tutorials online for adding a new disk to a machine and then extending an existing LVM partition to use the new device.
This particular tutorial covers the use case of adding a new disk to a Linux server and then creating a NEW LVM partition on it without modifying the existing devices and LVM partitions.
The first thing you will need to do is add the physical device to the server (or VM).
Then, you → Continue reading “Adding a New Disk to a Linux Server and Creating an LVM Partition”
Here is a quick snipped on how to benchmark Disk I/O with dd.
time sh -c "dd if=/dev/zero of=/home/rchapin/test.zeros bs=1024k count=10000 && sync"
10000+0 records in
10000+0 records out
10485760000 bytes (10 GB) copied, 81.4124 s, 129 MB/s
Will do a write test of 10GB.
You can do a similar test and read from that file generated and write to another file or /dev/null to get an idea of the read speeds.
See the → Continue reading “How To Benchmark Disk I/O”