Canada RAM sells external hard drive enclosures & network attached storage
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RAID - Redundant Array of Inexpensive Drives - is a method of using multiple hard drives together to provide larger capacity, higher speed access and / or data protection through redundancy. RAID can be accomplished through software, or it can be controlled by specialized hardware.
There are several levels of RAID:
RAID 0 or "striping" creates one large volume out of two hard drives by alternating data writes between the two drives. This provides faster access, because the duties are shared between the two hard drives. RAID 0 also has a higher risk of failure, because there is no redundancy, and if there is an error on either of the two drives, all the data on both drives can be lost.
RAID 1 or "mirroring" creates two identical drives, mirrors of each other, whatever is written to the main drive is also immediately written to the mirror drive. This protects against a hardware failure of one drive. RAID 1 is not a substitute for a data backup plan however, because whatever is done to the data on the main drive (such as accidental deletion, file corruption or virus damage) is also done to the mirror. As with RAID 0, RAID 1 is intended to work with two identical hard drives. RAID 1 gives you a net volume size of 1/2 of the space of the two drives - for example two 500 GB drives in RAID 1 would give a 500 GB volume.
RAID 5 and other levels of RAID use three or more drives to provide a mixture of striping for speed, and redundancy for safety. In a RAID 5 array, one drive out of the set is used as a checksum drive, which provides the information so that if any one of the drives in the RAID array fails, the data can be rebuilt onto a replacement drive. The usable size of a RAID 5 array depends on how many drives are in the set, for example if four 500 GB drives are used, one of them will be the checksum drive, so the size of the RAID volume will be 1,500 MB.
Multi-bay drive enclosures don't have to be used as a RAID array, they can be used simply as individual disks. This is a good approach for data backup and for large projects like graphics, audio and video. Our removeable-cartridge enclosures from Firmtek, Sonnet, Raidon and Wiebetech allow you to swap individual drives in and out, so a backup can be made and carried offsite, and major projects can have their own dedicated hard drive. This allows for virtually infinite storage, you can add more drives as you need them.
|Firmtek External Enclosure Kits: Enclosure & Cables. Firmtek manufactures the Seritek line of SATA and ESATA interfaces and drive enclosures. All of Firmtek's products are Macintosh compatible - Firmtek is the leading developer of SATA host adapter solutions for the Macintosh platform. (Drives for these enclosures )
| FirmTek SeriTek/2ME4-E PCI-Express (PCI-e) 4 port eSATA card, External SATA PCI-e SATA-2ME4-E || $ 251 Call to confirm price and availability || |
Enclosure availability and pricing can change without notice.
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* Free Memory shipping terms 500 grams (1 lb) max, 20mm thickness max. For desktop and laptop Memory only. Offer excludes server RAM, MacPro RAM and any prdocuts including drives, that are too large &/or heavy for the free ship lettermail envelope. *5 - 15 days, No tracking or shipping insurance is offered, there are no refunds for lost or damaged shipments on the free shipping option.*
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Installation: Goods are sold under the assumption that you have experience
installing. Installation instructions
for your specific machine are not included. Refer to your owner's manual
or manufacturer's Web site for compatibility and installation. If you are not confident, please take your machine to a technician for installation. We are not responsible for any damage occuring during or after installation of purchased products, nor for any incidental or consequential damage or data loss arising from installation or use of purchased products.
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Warranty: We only sell fully warranteed premium quality goods. We do not
take trade-ins of used memory. Full manufacturers' warranty
terms apply. Customer is responsible for warranty replacement shipping. Returns are by prior approval only, shipping
is not refundable, restocking
charge may apply on non-defective returns. Warranty
replacement only, no returns for refund on: Kingston memory, special
order goods, CPUs, Motherboards, Video cards, SSD and hard drives consumables, supplies or software. Canadaram strives for accuracy but is not responsible for errors or out of information on site or 'deep linked' searches to non-public pages.
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RAM manufacturers' warranty terms apply. See our Terms
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price can change without notice. Email for
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All brand names, model names and logos are trademarks of the respective companies and are used for identification purposes of compatible third party parts only.
|Mac & PowerBook
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