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hard disks

Maximum Number of Disks In RAID 5

Is there a limit to how many drives you can have in one RAID-5? What is the maximum number of physical drives recommended in a RAID-5 set?
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FreeBSD: Permanently Delete / Remove Files With Shred

I‘m going to upgrade my FreeBSD 7.x server hard disks and going to send back the original 73GB hard disk to my vendor. I wanted to make sure that no one should able to use my personal data from old hard disk, especially files stored in /home/you/projects directory. I know how to use sDelete under MS-Windows to delete a file permanently. How do I permanently erase files under FreeBSD operating systems?
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FreeBSD: How To Add A Second Hard Disk

Q. How do I add a second hard disk to my FreeBSD server? How do I partition, label and mount a new hard disk under FreeBSD for backup or additional data?
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Linux Hard Disk Format Command

Q. I’ve installed a new 250GB SATA hard disk on our office CentOS Linux server. How do I format a hard disk under Linux operating system from a shell prompt?
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What are the different RAID levels for Linux / UNIX and Windows Server?

Q. What are the different RAID levels? Which one is recommended for file server and database server?
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What Happens When Hard Disk Fails in RAID 5

Q. What happens when a hard disk fails in RAID 5? How many hard drive can fail in RAID 5?
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