Usb Pen Drive Capacity

[Jacqualine Henington]

Ihave just purchased a ReadyNAS 214 [RN21400]. I am running ReadyNAS 6.9.3

The marketing material states the RN214 has a max capacity of 48TB [4x12TB]

-storage/RN214.aspx

However the enclosed documentation indicates that the unit can only support 24TB [4x6TB]

-RN214.pdf

Obviously this severly impacts my storage capacity, and afftects what size drives I am about to purchase.

Where can I find out difinitively what the maximum drive size my RN214 can support?

I have just purchased a ReadyNAS 214 [RN21400].

The marketing material states the RN214 has a max capacity of 48TB [4x12TB]

-storage/RN214.aspx

However the documentation that comes with the drive indicates that it can only handle 24TB [4x6TB]

-RN214.pdf

Obviously this severly impacts my storage capacity, and afftects what size drives I am about to purchase.

Where can I find out difinitively what the maximum drive size my RN214 can support?

When Netgear releases a product, the data sheet uses the largest drives on the market at the time. They rarely go back and change the datasheet later on. In this case, they do say "Max Capacity (based on 6TB drives)" You can see the largest size drives that Netgear has tested with your NAS on the published hardware compatibility list here: -Hard-Disk-Compatibility-List

OS-6 systems like the RN214 have no known limit on maximum disk sizes they support. So when 16 TB drives come on the market, it is likely that they will work with your NAS. Although some operations (particularly RAID sync and scrubs) scale with the total disk size, so they would take 4x longer with (hypothetical)16 TB drives than they would take with 4 TB drives.

Generally XRAID is the best RAID configuration for most users, and it is expandable. The capacity rule is "sum the disks and subtract the largest". I generally suggesting leaving at least one empty slot if you can at the beginning, becausing adding another disk is the most cost effective way to expand the array. Getting fewer larger disks is cheaper in the long run.

Its 20TB on each internal bay, maximum total of 40TB in RAID 0 configuration. Maximum size for external drives connected to each USB port is 4TB total of 8TB. The maximum aggregated capacity between the 2 USB ports and 2 internal bays is 48TB.

This is my first post, so pardon in advance for noob questions. One of the reasons UnRAID appeals to me is the fact that you can start with a single drive and build up over time. I currently have a 10 TB drive in my desktop, which I'd like to use in the server. The plan would be to build the UnRAID server with that 10 TB drive as the only drive, then add more drives and use the 10 TB as the parity. I understand that any subsequent drives must be smaller than the parity, but does the total capacity of all drives have to be less than the parity? If I added 3x5 TB drives and used the 10 TB as parity, would I have 15 TB of useable space, protected from disk failure? Or would I want to get 2x5 TBs, then later get a 20 TB and make it the parity?

UNRAID just sums up every single sector of each drive and uses the result for the sector on the parity drive. If a data drive is smaller (aka: does not contain the higher sector numbers) the higher sectors are simply skipped throughout parity generation or check.

So if I ever want to install larger data drives I have to increase the Parity first. So if I went to 10TB Data Drives my first drive would be swapping out the 4TB for the 10TB. You could honestly think of the Parity as wasted/no space until it saves your butt a few times.

Can I start my server with just the single 10 TB drive, and then after I've added more drives, re-assign the 10 TB to be parity, or do I have to start with at least one drive in addition to the parity?

No data drive can be larger than parity, and you can't make any data slot smaller, only bigger. So if you start with a 10TB data drive and want to keep the data on it, you will need a 10TB drive or larger to assign as parity.

To clarify my question a little better, I understand that you have to have a data drive and don't necessarily need a parity drive. What I was hoping would be I could build the server with the 10 TB as the only drive installed, use it for data, without parity. Then, later, I could add say two 5 TB drives for data and re-assign the 10 TB to be a parity. I think from these responses that would be possible?

And since your example had 10TB parity plus 2x5TB data, I don't want you to get the idea that parity must equal the size of all the data disks. Parity just has to be at least as large as the largest single data disk. You could have 10TB parity plus several data disks of various sizes, each data disk could be up to 10TB.

After writing the FreeNAS IMG to a 16 GB USB flash drive, I can now only use 938 MB. I used the Win32 Disk Imager tool to write the IMG to the device. Then later, when I inserted the the USB drive into my Windows 7 computer it said that it had to be formatted, because it couldn't read it. I believe this is normal. So I formatted it inside Windows using the format option when prompted. So in Windows Explorer now, 938 MB is reported as capacity of this device.

Now, I have another 2 GB USB flash drive with the same problem. It too was used for FreeNAS, and it too has a reported capacity of only 938 MB. I thought it was broken there for a while, until I saw the same problem with this 16 GB model.

I tried using diskpart on the 2 GB model, and I saw that there were several partitions there (list partitions) just like on this one. So I used the clean option to try to wipe it, but that wiped off everything so it's totally useless now. I'm not sure how to rebuild it.

Is this a standard routine, like part of the whole "user experience", that whenever you make a bootable USB falsh drive with FreeNAS, it messes up your device? I am new to FreeNAS, so i wouldn't know. But it sure looks like it. Maybe it is in fact the format operation in Windows that messes things up... I don't know. It's not very nice.

I assume you know how to get to the Run prompt since you have arrived at SU. But if not, just press and hold down the Windows key on your keyboard. While still holding the Windows key, press the R key. Voil! La Run prompt! L'invite de commande!

Because flashdrives will only show the first partition, you cannot access the rest. However, using computer management->Disk management, you normally can increase the partition and include the unallocated space. Seeing your image, it may not be possible with this particular image unless you somehow made an error when trying to flash the image.

As mentioned earlier, with modern firmware, you can use any disks you want. However, you should be aware that SATA disks on that controller will downshift to 3.0Gbps link speeds, even if they're 6G drives.

Keep in mind that not all SATA drives will work on that controller/backplane/server combination. Don't try to stuff laptop hard disks in the server, or you may have fan/cooling/non-bootable system issues.

Disk capacity refers to the amount of data that a disk storage device can hold, usually measured in bytes. It is an important consideration when purchasing a hard drive or other storage device for your computer or other electronic device.

Hard disk drives (HDDs) and solid-state drives (SSDs) are both types of disk storage devices, but they differ in how they store data. HDDs store data on spinning disks, while SSDs use flash memory. SSDs have less capacity than HDDs, but they are faster and more durable.

Common disk capacity sizes for HDDs include 500GB, 1TB, 2TB, and 4TB. However, larger sizes such as 6TB, 8TB, and even 16TB are becoming more common as the demand for larger storage capacities increases.

Usable disk capacity refers to the amount of storage space available for storing data on a disk storage device. Raw disk capacity, on the other hand, refers to the total amount of storage space that is available on the device, including space that is reserved for the file system and other overhead.

The usable disk capacity is always less than the raw disk capacity because some of the space on the disk is reserved for the file system and other overhead. Additionally, some disk storage devices may have bad sectors that are unusable, which further reduces the usable capacity.

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