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Forum Discussion
Readynas NV+ SLOW TRANSFER SPEED
ReadyNAS NV+ RAIDiator 4.1.15 4x 1TB WD Green Raid 5 PC is gigbit, but my transfer speed maxes out at 12MB/sec. I've tried connecting directly to the NAS, and no change in speed. Jumbo frames...
I was very lucky in that aspect, and only paid $140 for the new readynas. Should have set up a remote connection to my pc so I could have started transferring everything off while I'm at work. Hindsight..
I didn't realize that it doesn't actually use raid 5. I do need the redundancy to protect my data, but is there a difference between the raid 5 and xraid? Or is it just a different name?
I didn't realize that it doesn't actually use raid 5. I do need the redundancy to protect my data, but is there a difference between the raid 5 and xraid? Or is it just a different name?
Astiran wrote:
I didn't realize that it doesn't actually use raid 5. I do need the redundancy to protect my data,It has the same redundancy as RAID-5. The only difference is the organization of the parity blocks. RAID-5 distributes the parity blocks over all the disks, RAID-4 puts them all on a dedicated parity disk. Distributing the blocks evens out the I/O across the disks. Your NV+ has hardware acceleration for RAID, and I think that is why it uses RAID-4.
Newer NAS (NV+ v2, ultra, pro, all OS 6 NAS) use RAID-5.
Astiran wrote:
is there a difference between the raid 5 and xraid?XRAID is built on top of standard RAID. In your NAS it will convert from single disk->raid 1->raid 4 as you add drives. If you upgrade all four drives, it will also expand the volume automatically. As you likely know, the NV+ can't handle drives larger than 2 TB.
On newer NAS, it can also handle drives of different sizes, and (if you want it) dual redundancy.
Found this in my partition logs.
WARNING: GPT (GUID Partition Table) detected on '/dev/hde'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1 doesn't contain a valid partition table
Disk /dev/md2 doesn't contain a valid partition tableDisk /dev/hdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000Device Boot Start End Blocks Id System
/dev/hdc1 32 4096031 2048000 fd Linux raid autodetect
Partition 1 does not end on cylinder boundary.
/dev/hdc2 4096032 5144607 524288 fd Linux raid autodetect
Partition 2 does not end on cylinder boundary.
/dev/hdc3 5144608 1953508815 974182104 fd Linux raid autodetect
Partition 3 does not end on cylinder boundary.Disk /dev/hde: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000
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