Posts Tagged ‘Basic’

How to create a Striped Volume

A striped volume (RAID-0) writes data in small blocks or stripes on two or more disks simultaneously. To create a striped volume you require at least two disks, however, having more than two disks participating in the striped volume will enhance further data access performance. That is, when data is written or read from a set of disks simultaneously the I/O bandwidth increases and hence, achieving better read and write transfer speeds. When creating a striped volume, the volume size is dependent on the disk with the smallest free space, as the portions of the disks included in the set need to be of the same size. I suggest to use full disks of the same size when creating striped volumes, otherwise, you end up with free spaces on some disks! While, the disks of a striped volume need to be converted to dynamic, remember that such volume is not fault-tolerant. If one disk fails, the entire volume fails.

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Be the first to comment - What do you think?  Posted by George - October 24, 2010 at 6:34 am

Categories: Devices, Disks   Tags: , , , , , , , , ,

Disk Partitions

In Windows 7 systems we find two different partitioning systems. These are the Master Boot Record (MBR) and the Globally Unique Identifier Partition Table (GPT) styles. While MBR is supported by all versions of Windows, GPT is only supported on Windows Vista, Windows 7, Windows Servers 2003 and 2008, and 64-bit versions of Windows XP. GPT offers several advantages over MBR such as, it can support up to 128 partitions while MBR supports only four, GPT is more reliable as it is aware of the modern disks geometries, GPT supports larger partitions – up to 18 Exabytes in theory and uses primary & backup partition tables for redundancy.

When using GPT partitions it is worth noting that larger partition sizes can have side-effects such as, take longer to check (running ChkDsk) and they are not compatible with all operating systems! Also, to boot from a GPT disk, the computer must support the Extensible Firmware Interface (EFI). Remember, that all BIOS based systems must boot from an MBR disk. Removable media cannot be partitioned with the GPT style.

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1 comment - What do you think?  Posted by George - October 2, 2010 at 12:18 pm

Categories: Devices, Disks, Installation   Tags: , , , , , , , , , ,