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Apple Computing Products:
macOS - Notebook Hardware
2nd HDD in MBP 13 mid 2010.
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<blockquote data-quote="Jonzjob" data-source="post: 1755184" data-attributes="member: 149248"><p>When I was servicing the IBM AS400 series I was installing some of the first U.K. kit to do with RAID and mirroring and thought it a great idea, but never dreamed that I would be able to have it on my own system? But then again, the MBP is probably more powerful than the biggest AS400s that I worked on and certainly has more disk space by a factor of about 10 or more! </p><p></p><p>I don't know if you knew the AS400 at all, but when they stuffed data onto the disks they were very fast because they spread the data across all of the drives. They would chuck a load of 2k batches of data to each of the disk stack controllers and there were usually several controllers each with several disks. Then they would get on with what ever alse. It was quick because the slow job of writing to the disks was done by the controllers, not the main processor. BUT, the problem was that each file was spread across all of the disks and only the processor/system knew where it was, so if you had a disk fail then you lost ALL of your files. When RAID and mirroring came in it was possible to rebuild the data without a problem. Before that backups were a total necessity!</p><p></p><p>One of the things that I really like about a NAS box over external HDDs is the ability to access them remotely. All I have to do now is to fathom out just how the **** to do it ;D;D</p><p></p><p>Scary stuff for me! </p><p></p><p>One of my life long ambitions has to be to grow old disgracefully. So far I am not doing too bad and as long as I can do that without upsetting others I will strive to do my best <img src="/mac_images/images/smilies/Innocent.png" class="smilie" loading="lazy" alt="O:)" title="Innocent O:)" data-shortname="O:)" /><img src="/mac_images/images/smilies/Innocent.png" class="smilie" loading="lazy" alt="O:)" title="Innocent O:)" data-shortname="O:)" /></p><p></p><p>Anyway, this growing old disgracefully is tyring and it's time I was in bed..</p></blockquote><p></p>
[QUOTE="Jonzjob, post: 1755184, member: 149248"] When I was servicing the IBM AS400 series I was installing some of the first U.K. kit to do with RAID and mirroring and thought it a great idea, but never dreamed that I would be able to have it on my own system? But then again, the MBP is probably more powerful than the biggest AS400s that I worked on and certainly has more disk space by a factor of about 10 or more! I don't know if you knew the AS400 at all, but when they stuffed data onto the disks they were very fast because they spread the data across all of the drives. They would chuck a load of 2k batches of data to each of the disk stack controllers and there were usually several controllers each with several disks. Then they would get on with what ever alse. It was quick because the slow job of writing to the disks was done by the controllers, not the main processor. BUT, the problem was that each file was spread across all of the disks and only the processor/system knew where it was, so if you had a disk fail then you lost ALL of your files. When RAID and mirroring came in it was possible to rebuild the data without a problem. Before that backups were a total necessity! One of the things that I really like about a NAS box over external HDDs is the ability to access them remotely. All I have to do now is to fathom out just how the **** to do it ;D;D Scary stuff for me! One of my life long ambitions has to be to grow old disgracefully. So far I am not doing too bad and as long as I can do that without upsetting others I will strive to do my best O:)O:) Anyway, this growing old disgracefully is tyring and it's time I was in bed.. [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
2nd HDD in MBP 13 mid 2010.
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