If you’ve got large files and need to copy them off your machine but dont have removable storage large enough, this is a simple and effective way to archive the files into compressed chunks of any size that will fit on your removable storage. These files can then be copied onto your removable storage and copied elsewhere in stages.
Example: Compress and split a Parallels Image into 1Gb chunks
At the command prompt type:
tar -cvf – path-to-your-file | gzip | split -b 1024m – path-to-where-to-save-the-chunks/prefix
You can change the split size to any size you want, just specify the size in megabytes :1024m is 1GB, 2048m is 2GB, etc.
The files are compressed into chunks as shown below. In this case the files are compressed and split into 1GB chunks, named with the prefix ‘image’ and appended with -aa, -ab etc to denote which part of the sequence of chunks the files is in.
To extract the chunks back into the original file(s)
Make sure you are in the same folder as the all chunks
At the command prompt type:
cat * | gunzip | tar -xvf -
The files will then be extracted from the chunks.
iPad 2 owners – don’t bother upgrading.
Recently a friend offered me £220 for my 11 month old iPad2 so that I could get a new iPad. I was really tempted since that meant that I would only have to find £179.00 to buy a 16GB new iPad. I popped down to my local Apple store to take a look at the awesome retina display and see the performance increase before I parted with my cash.
I was somewhat disappointed to find that the retina display update, whilst an exciting additional feature, was not enough to make a major difference to the user experience.
OK I know my eyes aren’t the best these days after 20 years looking at a computer screen, but you can only really see the difference when using the web browser and zooming in close so that you can see the smoothed fonts.
I have now heard that the battery takes 6+ hours to fully charge, that’s more than the iPad2’s 3-4. The new iPad still has a dual core processor, albeit more powerful. The quad core graphics chip seems impressive however.
Another problem is that I can see that all apps, especially games, are going to balloon in size due to the graphic assets needed to support the high resolution display. Some are saying that it is now pointless to buy a 16Gb iPad since it won’t take many apps to fill up the memory. The amount of apps that have had retina updates released recently is proving my point.
Here is a table of recent iPad2 and new iPad app sizes:
Bring on the ‘new new iPad’
A nice as it would be to have a shiny new iPad I can’t justify spending the money for not much of an upgrade. If they were to have brought Siri out for the iPad then maybe that would have been a different story and maybe they will do later this year when iOS 6 is released in June. Apple will certainly have to add more more servers to the already struggling Siri service.
Looks like the rule of thumb used by iPhone users to upgrade every other release is ringing true for iPad users too. Bring on the iPad 4, or do you think they will call it the ‘new new iPad’ !