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from the now-you-CAN-take-it-with-you? dept.
Seagate has launched the world's first 5 TB 2.5" hard disk drives (HDDs). However, they won't fit in most laptops:
The new Seagate BarraCuda 2.5" drives resemble the company's Mobile HDDs introduced earlier this year and use a similar set of technologies: motors with 5400 RPM spindle speed, platters based on [shingled magnetic recording (SMR)] technology with over 1300 Gb/in2 areal density, and multi-tier caching. The 3 TB, 4 TB and 5 TB BarraCuda 2.5" HDDs that come with a 15 mm z-height are designed for external storage solutions because virtually no laptop can accommodate drives of that thickness. Meanwhile, the 7 mm z-height drives (500 GB, 1 TB and 2 TB) are aimed at mainstream laptops and SFF desktops that need a lot of storage space.
Seagate has also launched a 2 TB shingled solid-state hybrid drive (SSHD) with 8 GB of NAND cache and a 128 MB DRAM cache buffer. The 1 TB and 500 GB versions also have 8 GB of NAND and 128 MB of DRAM. These are the first hybrid drives to use shingled magnetic recording.
Seagate press release (for "mobile warriors" only).
(Score: 2) by TheRaven on Wednesday October 26 2016, @06:29PM
How would you increase the size of the vdev? I was under the impression the above is not possible with ZFS. Would be interesting to have a read up on it.
I've not done this, but I believe it happens automatically. With RAID-Z, the size of the vdev is defined by the size of the smallest disk. If you replace all of the disks with larger ones, then I think that it increases automatically. The caveat with this is that you must replace each disk one at a time and wait for a resilver to occur. You get reduced (i.e. no) redundancy with this while the resilver is running (which can take a couple of days per disk) and you are really hammering the disks while you do it.
When I upgraded my NAS, I decided I wanted to turn on dedup for a lot more stuff, move to lz4 compression and change the hash function that I was using, so it was easier to just pop the old disks in a spare machine, do a fresh install on the new disks, and then zfs send | zfs receive the data over a GigE network cable. It took a couple of hours to get the core stuff there and a couple of days to finish it all off, but that was mostly because it's a comparatively slow machine (I mostly access it over WiFi, so performance isn't really an issue - the WiFi is the bottleneck) and I was deduplicating a bunch of data. Somewhat ironically, after doing the recompression and the deduplication, my space usage was down enough that everything fitted quite comfortably onto the old disks.
sudo mod me up