How I calculate the destination disk space

[chon_nb]

I using Backup exec system recovery desktop 2010 on windows xp.

Backup C drive to  NAS , Data size =40 GB , Capacity of C drive = 500 GB

Config Details.

Job Scheduled

A new recovery point set (Base): At 9:00 AM every Monday

Incremental At 9:00 AM on the specified days of the week (Tu,We,Th,Fr)

Compression:Standard

Limit the number of recovery point set saved for this backup Maxinum:1

Problem.

Error EBAB03F1: The operation was canceled by the user.
Info 6C8F1C2F: A recovery point operation on drive Drive Backup of (C:\) was cancelled by the user.
Error E7D1001F: Unable to write to file.
Error E7D1003C: There is not enough space.
Error EBAB03F1: There is not enough space on the disk.

Cause:

The destination drive is not large enough to store the Backup data.

Question

How I calculate the destination disk space for support my config? I have 10 PC.

[Markus_Koestler]

Drive C is 40 GB, so this is the size of the full on monday.

The size of the incrementals Tuesday-Friday depends on the amount of data that is changed. I assume 10% of 40GB per day = 4GB per day = 16GB for ALL the incrementals.

So for one PC you need 40+16 =56GB for a complete backup set.

Following this assumptions  you'd need 560GB for your 10 PCs.

The problem is to take an educated guess for the size of the incrementals.

[criley]

Drive C is 40 GB, so this is the size of the full on monday.

Actually, it will be less than this as he is using compression.

Until you do a full backup, you wont know for sure how big it will be. As an example, my laptops system drive has approx 90GB of data. Using standard compression, a full backup is approx 56GB.

As Markus says, it's very difficult to predict the size of the incremental backups.

How big is your NAS?

[chon_nb]

Thank you for all reply.

How big is your NAS? 

I want to know about maximum size for backing up, because i will buy new NAS for supporting the all of 10 PCs.

[Markus_Koestler]

I'd go for 1 TB NAS, so you're on the really safe side.

[Markus_Koestler]

Any updates here ?

[Markus_Koestler]

Any updates here ?

[Markus_Koestler]

Any updates here ?