raid0 and raid1

ito

In addition to data protection.
Is raid0 faster than raid1?

ask_seek_knock

There is, as the name suggests, zero protection for data in RAID0, but indeed best access performance.

dedipromo

For data protection, Raid1 > no Raid > Raid 0.

For speed, it's the reverse order.

darkimmortal

It's always worth spending some time with fio to find what works best with your hardware. Raid 1 read performance will be basically as good as raid 0 on any good raid implementation. Write will be same as a single disk

ViridWeb

@ito said:
In addition to data protection.
Is raid0 faster than raid1?

There are 100s of threads available on same topic. So there's no need to open another..

Anyway Raid 1 provide more protection than Raid 0
So if you have valuable data then go with Raid 1

Here's the calculator you can use
http://www.raid-calculator.com/

Pilotseye

You can never go wrong with YOLORAID - https://www.yoloraid.com/

MeAtExampleDotCom

@ask_seek_knock said: zero protection for data in RAID0

RAID0 and JBOD give essentially negative protection, compared to the 2+ drives configured with their own independent filesystems.

• Completely separate devices: any device dies, you lose that but data on the others is fine
• JBOD (via LVM for instance): no performance difference and if any device dies you most likely lose the data on all of them
• RAID0: performance benefits (assuming a good implementation) but if any device dies you definitely lose all the data on all of them
• RAID1: some performance benefit (assuming a good implementation), and if one device fails the other will survive with all the data, hopefully long enough for you to replace the failed unit and rebuild the array