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{"id":1052,"date":"2020-04-29T15:01:16","date_gmt":"2020-04-29T15:01:16","guid":{"rendered":"https:\/\/itenterpriser.com\/?p=1052"},"modified":"2020-04-30T09:06:39","modified_gmt":"2020-04-30T09:06:39","slug":"what-is-jbod","status":"publish","type":"post","link":"https:\/\/itenterpriser.com\/knowledge-base\/what-is-jbod\/","title":{"rendered":"What is JBOD? Quick and Dirty Maximum Capacity"},"content":{"rendered":"RAID (Redundant Array of Inexpensive Disks) is the combining of multiple disks to mimic a single logical storage unit, i.e., a single drive. Depending on the type, or “level”, RAID increases performance, capacity, and fault tolerance in some combination. So, what is JBOD?<\/p>\n
What is JBOD?<\/h2>\n
Only one of those attributes described above, increased capacity, applies to JBOD, the acronym for Just a Bunch of Disks. However, this most maligned of levels has a hole card–it can utilize the full capacity of every disk in the array, even when they’re not the same size.<\/p>\n
JBOD does this by simply stringing drives together, then filling them in order with data. This is called “spanning”, though a more descriptive term might be “spilling”. Much like a multi-tier fountain, data flows onto the first disk and when that’s full, spills onto the second disk, and then onto the third, etc. JBOD is also known as BIG and SPAN.<\/p>\n
“Just” and “Bunch” are not words you bandy about when you want to be taken seriously. Like RAID 0<\/a>, it doesn’t actually meet the criteria as there’s no redundancy or fault tolerance. Hence, it’s not to be used when data safety or availability are concerns.<\/p>\nThe Upside<\/h2>\n
As discussed…<\/p>\n