Good news for high volume data backup
In article , says...
You need multiple backup copies no matter what the backup media is. Yes, that is what I am suggesting. The DVDs are the backup of the RAID array. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
Good news for high volume data backup
Alfred Molon wrote:
[] JPEGs are already compressed. Compressing the RAW files would reduce their size to a bit over half, but it's not that practical (you have to decompress the files to be able to use them and this takes time). Actually, some operating systems include optional compression at the file level - for example NTFS. Has anyone measured how much extra time this would add to opening a RAW file? I haven't seen any significant extra time to using comressed files in NTFS, but I don't use RAW. Cheers, David |
Good news for high volume data backup
On Jan 6, 7:58*am, "David J Taylor" -this-
bit.nor-this-bit.co.uk wrote: Alfred Molon wrote: [] JPEGs are already compressed. Compressing the RAW files would reduce their size to a bit over half, but it's not that practical (you have to decompress the files to be able to use them and this takes time). Actually, some operating systems include optional compression at the file level - for example NTFS. *Has anyone measured how much extra time this would add to opening a RAW file? *I haven't seen any significant extra time to using comressed files in NTFS, but I don't use RAW. Raw files are compressed already. A non-compressed raw file on a 8MP camera with 12 bits/color would take 12 MBytes of space, but the normal size for a raw file from a 8MP camera is closer to 8MBytes. Scott Scott |
Good news for high volume data backup
On Jan 6, 9:59 pm, Scott W wrote:
Raw files are compressed already. Not all, my d200 offers either lossy compression or no compression. No lossless compression. |
Good news for high volume data backup
In article
, acl wrote: On Jan 6, 9:59 pm, Scott W wrote: Raw files are compressed already. Not all, my d200 offers either lossy compression or no compression. No lossless compression. the pentax k100d has uncompressed raw - 10 meg file from a 6mp sensor. |
Good news for high volume data backup
In article cee743f0-3371-4e7a-ad4f-ae667f92be21
@e23g2000prf.googlegroups.com, says... Raw files are compressed already. A non-compressed raw file on a 8MP camera with 12 bits/color would take 12 MBytes of space, but the normal size for a raw file from a 8MP camera is closer to 8MBytes. That depends on the camera. Not all cameras compress the RAW files. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
Good news for high volume data backup
On 6 Jan, 18:26, Alfred Molon wrote:
In article , says... did you ever consider compressing the files first ?? JPEGs are already compressed. Compressing the RAW files would reduce their size to a bit over half, but it's not that practical (you have to decompress the files to be able to use them and this takes time). Besides, should there be some data damage to individual bytes, with an uncompressed file only one pixel or also its neighbours are affected, while if it's a compressed file the damage is much greater. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum athttp://tech.groups.yahoo.com/group/MyOlympus/http://myolympus.org/photo sharing site I am going to buy a 500mb hdd shortly after thinking about putting data on DVD etc.. but a quick google shows JPG compression software.....whether it is useful or not I have yet to find out |
Good news for high volume data backup
On 6 Jan, 21:21, Bolshoi wrote:
On 6 Jan, 18:26, Alfred Molon wrote: In article , says... did you ever consider compressing the files first ?? JPEGs are already compressed. Compressing the RAW files would reduce their size to a bit over half, but it's not that practical (you have to decompress the files to be able to use them and this takes time). Besides, should there be some data damage to individual bytes, with an uncompressed file only one pixel or also its neighbours are affected, while if it's a compressed file the damage is much greater. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum athttp://tech.groups.yahoo.com/group/MyOlympus/http://myolympus.org/photosharing site I am going to buy a 500mb hdd shortly after thinking about putting data on DVD etc.. but a quick google shows JPG compression software.....whether it is useful or not I have yet to find out .....500gb.....about 99 euro's in Carrefour |
Good news for high volume data backup
On 1/5/08 9:57 PM, "george" wrote:
Of course on the downside for Blue Ray is that Sony is on their side. How can one argue with a company whose line of "successes" include: 1) Betamax 2) MD 3) 8mm video 4) Hi-8 video 5) Digital-8 video 6) Memory Stick and Memory Stick Pro 7) SACD 8) Li-Ion batteries used in Dell and other PCs (you remember, that enormous recall...) I've probably even missed some! Don't forget the Windows root kit that was on Sony BMG audio CDs until public outcry (and some lawsuits) made them change. |
Good news for high volume data backup
Bolshoi wrote:
....500gb.....about 99 euro's in Carrefour Fry's in the US just had a special: Seagate 500GB PATA for 99$ US. At the current exchange rate that's just 67 Euro. BTW: I'm pretty sure you didn't mean gramm bit (that would be gb) but giga byte (that's GB) ;-)) jue |
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