5 ms·
> Is that comparison fair? If you have 2 raid-5 mirrored raid 5 boxes in your room and all disks fail at the same time, you should complain. And that won't happ
by phone8675309 5y ago
> Is that comparison fair? If you have 2 raid-5 mirrored raid 5 boxes in your room and all disks fail at the same time, you should complain. And that won't happen.
There are plenty of situations where this might happen if they’re in your room: a lightning strike can cause a surge that causes the disks to fry, a thief might break in and steal your system, your house might burn down, an earthquake could cause your disks to crash, a flood could destroy the machines, and a sinkhole could open up and swallow your house. You may laugh at some of these as being improbable, but I have seen _all_ of these take out systems between my times in Florida (lightning, thief, sinkhole, and flood) and California (earthquake and house fire).
The fix for this is the same fix as being proposed by the parent post - putting physical space between the two systems so if one place become unavailable you still have a backup.
- greiskul 5y agoI have had a job where my small, internal tool, for debugging purposes, had to be deployed to a minimum of 3 datacenters. I had 2 of them in the US and one in Europe, and was asked to move one of the US ones to a datacenter that was in another coast, cause who knows, maybe an earthquake will knock off all of the US west coast. That is the paranoia level necessary to achieve crazy high uptime.