On Thu, Sep 24, 2020 at 9:26 PM Amey Abhyankar <sco1984 at gmail.com> wrote: > Hello, > > I have a blade server with SAS HDD's of 12TB in total. > 3 HDD's of 4TB each. > > Is it possible to install Cent OS 7.8.2003 on 12TB disk space? > I will be installing Cent OS on the bare metal HW. > > the SAS hardware has to be SAS2 or newer, as SAS1 had a maximum physical drive size of around 2tb and the boot volume has to be GPT as MBR has a 2TB limit. otherwise, sky is the limit, however, what the other guys say, I do NOT put my OS on my data raids, its usually on its own mirror of two small drives. I also tend to avoid "hardware" raid cards, and prefer HBA cards that present the drives as plain SAS devices, then use the OS's native storage management for raid (mdraid + LVM for Linux, ZFS on FreeBSD, etc).. I generally spec raid 10 for performance data, and raid 6 or 60 for bulk data. raid5 is frowned on these days, disks are so big, and rebuild times are long enough that the risk of a double failure is fairly high.