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Apple Computing Products:
macOS - Desktop Hardware
Some questions about RAID
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<blockquote data-quote="martyp" data-source="post: 797717" data-attributes="member: 61183"><p>For a server environment I'd highly recommend you run a RAID 1 array. RAID0 as you probably know has no redundancy. </p><p></p><p>Now if you consider 'uptime' for the server, say one drive fails on RAID0. You've lost everything, you need to go to the store and get another drive the same as the other one (or maybe you'll need to buy 2 new ones because they don't make the model you had anymore) and then you can restore from a backup and probably configure it again depending on the backup. That will take at least 2 days. </p><p></p><p>If you run RAID1 and a drive fails the sever won't act much different apart from a warning from the RAID controller. You then order a new drive, pop it in, fire the server back up and it begins mirroring the drives again. Total downtime - 30 mins tops!</p><p></p><p>The answer to your second question is, you will basically need to start again. Both drives must be identical you can't do a RAID array with a 160 + 500GiB drive. Simply by two new 500GiB drives and copy the contents from the old drive over with a USB2 hard drive caddy.</p><p></p><p>Just a note, please don't rely on RAID1 as your only backup. If your server gets a power surge or two drives fail etc, you'd have nothing. And always keep the current backup of the server off-site too. </p><p></p><p>As far as hardware goes, I'm not sure if you'll need a RAID controller card or if OS X can do some sort of software RAID - which isn't as good but it would be free! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>If you need any explanation on the above let me know.</p><p></p><p>Cheers,</p><p></p><p>Marty</p></blockquote><p></p>
[QUOTE="martyp, post: 797717, member: 61183"] For a server environment I'd highly recommend you run a RAID 1 array. RAID0 as you probably know has no redundancy. Now if you consider 'uptime' for the server, say one drive fails on RAID0. You've lost everything, you need to go to the store and get another drive the same as the other one (or maybe you'll need to buy 2 new ones because they don't make the model you had anymore) and then you can restore from a backup and probably configure it again depending on the backup. That will take at least 2 days. If you run RAID1 and a drive fails the sever won't act much different apart from a warning from the RAID controller. You then order a new drive, pop it in, fire the server back up and it begins mirroring the drives again. Total downtime - 30 mins tops! The answer to your second question is, you will basically need to start again. Both drives must be identical you can't do a RAID array with a 160 + 500GiB drive. Simply by two new 500GiB drives and copy the contents from the old drive over with a USB2 hard drive caddy. Just a note, please don't rely on RAID1 as your only backup. If your server gets a power surge or two drives fail etc, you'd have nothing. And always keep the current backup of the server off-site too. As far as hardware goes, I'm not sure if you'll need a RAID controller card or if OS X can do some sort of software RAID - which isn't as good but it would be free! :) If you need any explanation on the above let me know. Cheers, Marty [/QUOTE]
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Apple Computing Products:
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Some questions about RAID
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