TOPIC: HARD DISK DRIVE
Pondering storage options
1st June 2011The combination of curiosity and a little spare time had me browsing online computing technology stores recently. A spot of CD and DVD burning brought on by a flurry of Linux distribution testing reminded me of the possibility. Because I have built up a sizeable library of digital photos, ensuring that I have backups of them is something that needs doing. While a 2 GB Samsung external hard drive is brought to life every now and again for that purpose, the prospect of using Blu-ray discs has appealed to me. After all, capacities of 25 GB for single-layer discs and 50 GB for dual-layer ones sound not inappropriate for my purposes. However, they aren't a cheap option at the time of writing, with each disc costing in the region of £3-4 at one place where I was looking. The cost of BD writers themselves seems not to be so bad though, with a few in the £60-100 bracket; any lower than this and you could end up with a combo drive that reads Blu-ray discs and writes to DVD's and CD's, so a modicum of concentration is needed. As attractive as the idea might be, the cost of BD media means that I'll wait a little while before deciding to take the plunge. The price premium at the moment is a reminder of the way that things used to be when CD and DVD writers first came on the market. It is very telling when discs come packaged in jewel cases, something that you won't see too often with CD's or DVD's.
Another piece of storage excitement that hasn't escaped me is the advent of SSD hard drives. With no moving parts like in conventional hard drives, they bring a speed boost. Concerns about their lifetimes and the numbers of read/write events per drive would stall me when it comes to storing personal data on them but using them for the likes of operating system files sounds attractive, especially with my partiality to Linux perhaps not hammering drives so much. As with any new technology, there is a price premium, even though a drive big enough for hosting an operating system can be acquired for less than £100. As with many of my hardware purchase brainwaves, there's no rush, but this is an option that I'll keep at the back of my mind.
Another appealing notion is the idea of getting a NAS so that files can be shared between a few computers. While I have seen prices starting at just above £70 for single disk enclosures, these generally are a more expensive option than external drives, and that's before you consider the cost of any hard drives. Nevertheless, the advantages of a unit containing more than a single hard drive while operating as a print server for any compatible printer, too. When you get to 4 or 5 hard drive trays, then the cost has mounted, but that could be when they pay their way too. What reminded me of these was a bookazine on home networking that I recently found at a branch of WHSmith's and their attractions are subject to the networking side of things being made to work without a drama. Once that's out of the way, then their usefulness really does appeal.
Mulling over all these brainwaves is one thing, but it doesn't mean that the purse strings will become too loose in this age of economic constraint. In fact, pondering them may serve to staunch any impulse purchases. Sometimes, a spot of virtual shopping serves to control things rather than losing the run of oneself.
From laptop limbo to a new desktop: A weekend restoration of computing order
12th July 2009This weekend, I finally put my home computing displacement behind me. My laptop had become my main PC, with a combination of external hard drives and an Octigen external hard drive enclosure keeping me motoring in laptop limbo. Having had no joy in the realm of PC building, I decided to go down the partially built route and order a bare-bones system from Novatech. That gave me a Foxconn case and motherboard loaded up with an AMD 7850 dual-core CPU and 2 GB of RAM. With the motherboard offering onboard sound and video capability, all that was needed was to add drives. I added no floppy drive but instead installed a SATA DVD Writer (not sure that it was a successful purchase, though, but that can be resolved at my leisure) and the hard drives from the old behemoth that had been serving me until its demise. A session of work on the kitchen table and some toing and froing ensued as I inched my way towards a working system.
Once I had set all the expected hard disks into place, Ubuntu was capable of being summoned to life, with the only impediment being an insistence of scanning the 1 TB Western Digital and getting stuck along the way. Not having the patience, I skipped this at start up and later unmounted the drive to let fsck to do its thing while I got on with other tasks; the hold up had been the presence of VirtualBox disk images on the drive. Speaking of VirtualBox, I needed to scale back the capabilities of Compiz, so things would work as they should. Otherwise, it was a matter of updating various directories with files that had appeared on external drives without making it into their usual storage areas. Windows would never have been so tolerant and, as if to prove the point, I needed to repair an XP installation in one of my virtual machines.
In the instructions that came with the new box, Novatech stated that time was a vital ingredient for a build, and they weren't wrong. While the delivery arrived at 09:30, I later got a shock when I saw the time to be 15:15! However, it was time well spent when I noticed the speed increase on putting ImageMagick through its paces with a Perl script. In time, I might get brave and be tempted to add more memory to get up to 4 GB; the motherboard may only have two slots, but that's not such a problem with my planning on sticking with 32-bit Linux for a while to come. My brief brush with its 64-bit counterpart revealed some roughness that warded me off for a little while longer. For now, I'll leave well alone and allow things to settle down again. Lessons for the future remain, over which I may even mull in another post...
Terminology for larger and larger disk drive data volumes
3rd October 2007When I started into the world of computing at university, 200-300 MB hard drives were the norm for PC's. My own first PC had what was then thought a sizeable 1.6 GB disk, only for things to increase in size since then. Now, I have access to several hundred gigabytes of storage at home, while we are now seeing 1TB offerings for the PC market.
Terabyte storage has been the preserve of the server market, but given the disk sizes that are available now, even larger units are needed to describe the sizes of data volumes, ones that I haven't seen before. So here goes:
|
Unit |
Number of bytes |
Number of bytes |
Number of bytes |
|
petabyte |
1024 TB |
2**50 |
10**15 |
|
exabyte |
1024 PB |
2**60 |
10**18 |
|
zettabyte |
1024 EB |
2**70 |
10**21 |
|
yottabyte |
1024 ZB |
2**80 |
10**24 |
* Binary measurements are used by operating systems like Windows and Linux, while decimal ones are used by hard drive manufacturers
While I know that the above strays into the realms of esoterica, the way that things have been going may mean that we are talking about petabytes before very long. As it so happens, HP recently mentioned zettabytes when talking about its range of UNIX servers and I needed to go looking up what it meant...