RAID 5 vs RAID 1 – Is RAID 5 really worth it these days?

<p style=”margin-bottom: 8px; margin-top: 0px; color: #333d42; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, ‘Helvetica Neue’, Arial, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’, sans-serif; font-size: 14px;”>I apologize if this isn’t the right subreddit for this…<br style=”margin-bottom: 0px; margin-top: 0px;” />First, RAID is NOT A BACKUP STRATEGY. I have a separate backup strategy. The goal here is redunancy for the sake up uptime in case of drive failure.</p>
<p style=”margin-bottom: 8px; margin-top: 8px; color: #333d42; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, ‘Helvetica Neue’, Arial, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’, sans-serif; font-size: 14px;”>In terms of redundancy, I’m not clear what advantage RAID 5 has over RAID 1 (mirroring). I understand the advantage is supposed to be that you get more useable storage out of a set of drives (3/4 of the total drive capacity).</p>
<p style=”margin-bottom: 8px; margin-top: 8px; color: #333d42; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, ‘Helvetica Neue’, Arial, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’, sans-serif; font-size: 14px;”>However, for instance, these days four 5 TB drives costs over $700 (a RAID 5 setup), whereas two 16TB drives (RAID 1) costs just over $400. On each, total capacty of 15-16TB. RAID 1 is faster.</p>
<p style=”margin-bottom: 8px; margin-top: 8px; color: #333d42; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, ‘Helvetica Neue’, Arial, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’, sans-serif; font-size: 14px;”>Why would anyone want to go with RAID5? Would it just be the need for a total capacity larger than 32TB, which is the maximum drive size right now?</p>
<p style=”margin-bottom: 0px; margin-top: 8px; color: #333d42; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, ‘Helvetica Neue’, Arial, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’, sans-serif; font-size: 14px;”>EDIT: LOL I love everyone in here assuming I’m editing House of Dragons in 8K for $500 per hour and need a petabyte of data on a network NAS. I’m editing 1080p for my church, for free. I need about 16TB of storage, hence the numbers in my post. The example sizes do indeed exist and are indeed the prices I cited, at least according to Amazon as of today.</p>