I'm doing something like this and formatting the filesystem is taking a long time so I'm guessing I have something wrong. 

sda is spinning and sdb, sdc and sdd are SSD.

```
clearpart --drives=sda,sdb,sdc,sdd --initlabel
part swap --recommended --ondisk=sda
part / --size=4096 --grow --ondisk=sda
part pv.11 --size=100 --grow --ondisk=sdb
part pv.12 --size=100 --grow --ondisk=sdc
part pv.13 --size=100 --grow --ondisk=sdd
volgroup datavg --pesize=4096 pv.11 pv.12 pv.13
logvol /data --fstype=ext4 --name=datalv --vgname=datavg --size=100 --grow --percent=100 raid.11 raid.12 raid.13

```

Questions:

1. Should I be passing ext4 options?
2. Is my stripe of 4M correct?
3. Should I be adjusting anything else in LVM?

The goal:

1. stripe three SSD disks together for performance under a Cassandra load.
2. Support TRIM
3. use the drives correctly to extend lifespan

Thanks!

Alan