Part Number: 70-40085-01*
*Click Part Number to Buy or For Pricing Info
Brand: DEC (Digital Equipment Corporation)
Description: Refurbished 704008501 / Compaq Fan Storageworks Raid Array 8000 Enterprise Sto_ 30 Day Warranty
Call 714-662-4959 or 800-392-6962
Showing posts with label RAID. Show all posts
Showing posts with label RAID. Show all posts
Saturday, February 18, 2012
Saturday, February 11, 2012
39R8850 New IBM RAID Adapter
[caption id="" align="alignleft" width="350" caption="39R8850 New IBM RAID Adapter"]
[/caption]
Part Number: 39R8850 *
*Click Part Number to Buy or For Pricing Info
Brand: IBM
Description: New MegaRAID 8480 SAS PCIE PCI-Express RAID adapter/ 90 Day Warranty
More product info on 39R8850
[/caption]Part Number: 39R8850 *
*Click Part Number to Buy or For Pricing Info
Brand: IBM
Description: New MegaRAID 8480 SAS PCIE PCI-Express RAID adapter/ 90 Day Warranty
More product info on 39R8850
Tuesday, February 7, 2012
46M0917 New IBM RAID Controller Battery
[caption id="" align="alignleft" width="260" caption="46M0917 New IBM RAID Controller Battery"]
[/caption]
Part Number: 46M0917*
*Click Part Number to Buy or For Pricing Info
Brand: IBM
Description: New/NIB RAID Controller Battery - Lithium Ion Li-Ion Weight 0.45 lbs. New Manufacturers Warranty
More product info on 46M0917
[/caption]Part Number: 46M0917*
*Click Part Number to Buy or For Pricing Info
Brand: IBM
Description: New/NIB RAID Controller Battery - Lithium Ion Li-Ion Weight 0.45 lbs. New Manufacturers Warranty
More product info on 46M0917
Saturday, February 4, 2012
71P8644 Refurbished IBM Raid Kit Controller
[caption id="" align="alignleft" width="82" caption="71P8644 Refurbished IBM Raid Kit Controller"]
[/caption]
Part Number:71P8644 *
*Click Part Number to Buy or For Pricing Info
Brand: IBM
Description: Refurbished ServeRAID 7K Ultra320 Raid Kit Controller FRU 71P8644 30 Day Warranty
[/caption]Part Number:71P8644 *
*Click Part Number to Buy or For Pricing Info
Brand: IBM
Description: Refurbished ServeRAID 7K Ultra320 Raid Kit Controller FRU 71P8644 30 Day Warranty
Monday, December 19, 2011
Can one recover data from a failed drive in RAID 0 array?
RAID stands for redundant array of independent disks. There are various RAID implementations, some built for boosting the performance, some for increasing the redundancy of the data and some others for achieving both. RAID 0 is built solely for performance boosting. In RAID 0, the data is split in to stripes and is stored independently on different drives. The data is read or transferred parallely and this increases the speed of RAID 0 system. Basically, for such a system, redundancy or fail safe is zero or does not exist. In RAID 0, error checking is not implemented. So, one cannot check for errors in his data in a RAID 0 system.
More number of drives increases the speed with which one can access or write data incredibly. But if even one drive fails in a RAID 0 system, the entire information stored on all the three drives is lost because the data is stored in divided blocks. To put it simply, if you are storing a movie file on a RAID 0 system, some part of the movie is stored on drive one, some of it is stored on other drive and remaining part on remaining drives. So, even if one drive fails, one part of your movie is destroyed. And as a result, the integrity of your movie file is disrupted. So, you cannot play the file.
RAID 0 implementation is used in gaming servers where there is no need for a failsafe, but the only need is higher speed. If you notice that one hard drive among your RAID 0 system is failing, you should immediately back up the drive, or remove the drive from RAID 0 system by copying the data on that drives to other drives of RAID 0 system. In this way, one can protect their data from a hard disk failure. In case of a failed hard drive in a RAID 0 system, it is not impossible to recover the data but it is not even easy. The data from the failed hard drive disks can be collected by specialized professionals and some softwares. Then that data can be added to the existing RAID 0 system.
There are other RAID implementations like RAID 1, 2, 3 and so on till 6. Some of these are built strictly for data security such as RAID 1. This implementation needs at least two identical hard drives. RAID 1 mirrors the data stored on one drive on to the other, so that in case of failure, a back-up is immediately available.
By: Sandeep Mahanthi
More number of drives increases the speed with which one can access or write data incredibly. But if even one drive fails in a RAID 0 system, the entire information stored on all the three drives is lost because the data is stored in divided blocks. To put it simply, if you are storing a movie file on a RAID 0 system, some part of the movie is stored on drive one, some of it is stored on other drive and remaining part on remaining drives. So, even if one drive fails, one part of your movie is destroyed. And as a result, the integrity of your movie file is disrupted. So, you cannot play the file.
RAID 0 implementation is used in gaming servers where there is no need for a failsafe, but the only need is higher speed. If you notice that one hard drive among your RAID 0 system is failing, you should immediately back up the drive, or remove the drive from RAID 0 system by copying the data on that drives to other drives of RAID 0 system. In this way, one can protect their data from a hard disk failure. In case of a failed hard drive in a RAID 0 system, it is not impossible to recover the data but it is not even easy. The data from the failed hard drive disks can be collected by specialized professionals and some softwares. Then that data can be added to the existing RAID 0 system.
There are other RAID implementations like RAID 1, 2, 3 and so on till 6. Some of these are built strictly for data security such as RAID 1. This implementation needs at least two identical hard drives. RAID 1 mirrors the data stored on one drive on to the other, so that in case of failure, a back-up is immediately available.
By: Sandeep Mahanthi
Sunday, July 4, 2010
Data Storage & Media (Tapes & Disks)
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