Should We Ever Talk About JBODs
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@scottalanmiller
I'm familiar with JBOD as just a random collection of drives with no logical filter between them and the host.Now RAIN -- I have to admit to having never heard this term outside of weather. I'm not exactly a newb in the realm of computing, so I'm wondering which terminology silo it came from.
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@Tim_G said in Should We Ever Talk About JBODs:
Every time in Microsoft documentation they use the word JBOD, it's used correctly that I've seen. It's used to mean one thing, always. It's never used to mean anything other than this: http://dataonstorage.com/dns-jbod-enclosure/dns-2608-4u-32-bay-12gbps-sas-enterprise-jbod-storage-enclosure.html
Is it? So with SS for example, it won't function with actual JBODs, but only JBOD enclosures? There is no way to use it with local disks? How does it know?
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@AmishBIll said in Should We Ever Talk About JBODs:
Now RAIN -- I have to admit to having never heard this term outside of weather. I'm not exactly a newb in the realm of computing, so I'm wondering which terminology silo it came from.
It came from the RAID world once systems moved past traditional RAID.
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Okay, what about this view...
What would you have called this before the term JBOD?: http://dataonstorage.com/dns-jbod-enclosure/dns-2608-4u-32-bay-12gbps-sas-enterprise-jbod-storage-enclosure.html
If you say "disk enclosure", then you can't use that as easily as JBOD. Because a disk enclosure can contain a bunch of disks that are already raided by some means. Therefore, you can't say just disk enclosure. JBOD specifically implies a disk enclosure that is not raided by anything.
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@Tim_G said in Should We Ever Talk About JBODs:
Every time in Microsoft documentation they use the word JBOD, it's used correctly that I've seen.
They defined JBOD in one document as always having redundant controllers and power supplies. I believe that alone means that they're not sticking to anyone's agreed concept of "correct".
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@Tim_G said in Should We Ever Talk About JBODs:
Okay, what about this view...
What would you have called this before the term JBOD?: http://dataonstorage.com/dns-jbod-enclosure/dns-2608-4u-32-bay-12gbps-sas-enterprise-jbod-storage-enclosure.html
If you say "disk enclosure", then you can't use that as easily as JBOD. Because a disk enclosure can contain a bunch of disks that are already raided by some means. Therefore, you can't say just disk enclosure. JBOD specifically implies a disk enclosure that is not raided by anything.
But a JBOD enclosure can have RAID added to it. So I don't see how that clarifies anything. A RAID enclosure is used to tell us that there is RAID. Disk enclosure to tell us that it is an enclosure of disks, like JBOD. A disk enclosure / JBOD can always have RAID and, it is assumed, will always have something at least RAID-like.
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@Tim_G said in Should We Ever Talk About JBODs:
Okay, what about this view...
What would you have called this before the term JBOD?: http://dataonstorage.com/dns-jbod-enclosure/dns-2608-4u-32-bay-12gbps-sas-enterprise-jbod-storage-enclosure.html
If you say "disk enclosure", then you can't use that as easily as JBOD. Because a disk enclosure can contain a bunch of disks that are already raided by some means. Therefore, you can't say just disk enclosure. JBOD specifically implies a disk enclosure that is not raided by anything.
And what happens the moment you apply RAID or something else to it? Is it suddenly no longer JBOD?
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@Tim_G said in Should We Ever Talk About JBODs:
... Because a disk enclosure can contain a bunch of disks that are already raided by some means.
If you're supplied something that already has some means of RAID applied at the box level, I personally wouldn't call that a simple disk enclosure. It's now an appliance, not a disk enclosure.
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@Dashrender said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
Okay, what about this view...
What would you have called this before the term JBOD?: http://dataonstorage.com/dns-jbod-enclosure/dns-2608-4u-32-bay-12gbps-sas-enterprise-jbod-storage-enclosure.html
If you say "disk enclosure", then you can't use that as easily as JBOD. Because a disk enclosure can contain a bunch of disks that are already raided by some means. Therefore, you can't say just disk enclosure. JBOD specifically implies a disk enclosure that is not raided by anything.
And what happens the moment you apply RAID or something else to it? Is it suddenly no longer JBOD?
That's the problem, it gets confusing at that point.
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@Dashrender said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
... Because a disk enclosure can contain a bunch of disks that are already raided by some means.
If you're supplied something that already has some means of RAID applied at the box level, I personally wouldn't call that a simple disk enclosure. It's now an appliance, not a disk enclosure.
Right, I can't think of any case where disk enclosure != JBOD enclosure. I guess if we are referring to many enclosures of varying types? Maybe?
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@scottalanmiller said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
Every time in Microsoft documentation they use the word JBOD, it's used correctly that I've seen. It's used to mean one thing, always. It's never used to mean anything other than this: http://dataonstorage.com/dns-jbod-enclosure/dns-2608-4u-32-bay-12gbps-sas-enterprise-jbod-storage-enclosure.html
Is it? So with SS for example, it won't function with actual JBODs, but only JBOD enclosures? There is no way to use it with local disks? How does it know?
It's all in the context of which it's being used. I've never seen JBOD used officially, in a context that doesn't imply a JBOD enclosure.
I suppose you could say, "set up your servers internal storage in a JBOD configuration". Or you could say "hook up your server to a JBOD". Or even "I just dropped my JBOD enclosure"
Honestly, all are correct, and I don't see any issue what so ever with any. It doesn't make me any less knowledgeable or show that I can't do my job less well than someone else who avoids the term.
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I guess one of the things for me is, I've never used the term and have not lacked for expressive terminology. And it isn't like I don't have to talk about disks on a regular basis.
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@Tim_G said in Should We Ever Talk About JBODs:
It's all in the context of which it's being used. I've never seen JBOD used officially, in a context that doesn't imply a JBOD enclosure.
I take that back. I have in a "configuration" sense.
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For example, I don't consider DROBO a disk enclosure, it's an appliance. The device itself applies whatever RAID level I want to the disks, then there is an interface to that storage (either block level or share level).
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@Tim_G said in Should We Ever Talk About JBODs:
Honestly, all are correct, and I don't see any issue what so ever with any. It doesn't make me any less knowledgeable or show that I can't do my job less well than someone else who avoids the term.
The problem is, and we've proven this I feel beyond any doubt, is that if you use the term you are no longer able to reliable convey your meaning to other IT pros. Certainly not ones in this thread, ML, SW or at MS. All of them have differing, conflicting ideas from how you just used it.
The majority of "JBOD discussions" if you will, that I have seen, involve "just a bunch of disks" in a server, not in an enclosure. So the majority that I see would find this conversation very confusing because they are using the accepted Wikipedia definition, not the one that implies an enclosure.
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@Tim_G said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
It's all in the context of which it's being used. I've never seen JBOD used officially, in a context that doesn't imply a JBOD enclosure.
I take that back. I have in a "configuration" sense.
I've seen it in a requirement sense.
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@Tim_G said in Should We Ever Talk About JBODs:
It's all in the context of which it's being used. I've never seen JBOD used officially, in a context that doesn't imply a JBOD enclosure.
As just a random phrase with no official product or sponsor, I'm not sure any use is more or less official than any other. Wikipedia would be the closest to official that you could get, or maybe the OED if they covered that sort of thing.
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@scottalanmiller said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
It's all in the context of which it's being used. I've never seen JBOD used officially, in a context that doesn't imply a JBOD enclosure.
I take that back. I have in a "configuration" sense.
I've seen it in a requirement sense.
LOL - so the people who required JBOD didn't care about their data I take it?
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@Dashrender said in Should We Ever Talk About JBODs:
@scottalanmiller said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
@Tim_G said in Should We Ever Talk About JBODs:
It's all in the context of which it's being used. I've never seen JBOD used officially, in a context that doesn't imply a JBOD enclosure.
I take that back. I have in a "configuration" sense.
I've seen it in a requirement sense.
LOL - so the people who required JBOD didn't care about their data I take it?
Microsoft lists it as a requirement.
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Okay, so I have taken a look at the history of "JBOD" on Wikipedia... take a look at it, just for laughs. Click on the history tab and change edits to 500, then search JBOD.. highlight them if using firefox to find them easier. Look at the bigger edits. To me it's all a joke, now.
The more I look at the meaning of "JBOD" from "word authority" sites like Wikipedia and others, and various IT pros and such, the more I feel that the word "JBOD" is just some randomly made acronym with no real value. It seems to be just a big marketing term, and also a literal term used to mean an actual bunch of disks in the sense that there's some disks not yet in a RAID, and that are shown as pass-through disks if there's a hardware raid card present.
