[KaiserPro]

This might sound a bit glib, but raid 5 shouldn't really be used in modern storage.

If you ignore the performance issues (which can vary by device) its just not safe. Depending on the size of drive can take anywhere up 30hours+ to rebuild.

bear in mind that you tend to use disks that are all the same batch, it leaves you in the danger zone for far too long.

Your options are: somesort of clever RAID (ZFS type thing) Another type of clever RAID (Like the LSI chunk thingy in the DCS37000) RAID 10

[fiatmoney]

For SSDs, where the time-to-read/write-full-capacity is typically much less than HDDs (both due to higher speed & lower capacity), it can be less of a poor decision. SSDs also have somewhat more advanced machinery for data integrity checking and slightly friendlier failure modes (e.g., the sectors "wear out" over time, but the firmware tends to warn you as that starts to happen, and you're not going to hit a sudden mechanical failure).