Re^3: How to concatenate N binary buffers?

[afoken]

Another interesting question: is it faster to concat data and then write once, or is it faster to issue one syswrite for each buffer? I'm afraid I'll have no time to benchmark.

You try to read data from a broken RAID. And your main problem is performance? Sorry, I don't get it. You should be happy with every single bit you can still read. And while one can use perl for data rescue, I think you should not use perl for the job. There are better tools, and you seem to know none of them, including Perl. Pay an expert to recover your RAID. If you need your data back fast, you'll probably have to pay an extra fee.

Questions you should ask later: Why did nobody notice that the RAID had problems before it failed? Why is there no recent, verified backup of the RAID?

Alexander

[mantager]

You try to read data from a broken RAID. And your main problem is performance?

Yes. Well, no. I mean, I was just wondering... but what if the raid array was some many terabytes in size? It could take some days to rescue it. Just a few days spared could come in handy :)

I think you should not use perl for the job. There are better tools, and you seem to know none of them, including Perl

Come on, now you're being unfair. I am no perl developer, for sure, but I know a little. And if I'm here to ask, it's for sure because I don't know everything... why is there a "seekers of Perl wisdom" section at all, otherwise? It's not "guru meditations", afaik.
As for the "better tools", I would really like to know more, if you're willing to tell me.

Pay an expert to recover your RAID

Why? I did it myself. Using Perl, among other things. I'm enough an expert to get data back from a corrupted disk, raid array or whatever is still willing to give me some bit of information :)