How to replace a failed or faulty HARD DISK on your QNAP NAS
41.2 هزار بار بازدید -
4 سال پیش
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It's not something we hope
It's not something we hope for, but unfortunately from time-to-time hard drives fail. In this video, we show you how to replace a failed hard disk in your QNAP NAS.
We recommend that as well as backing up your data on a regular basis, make sure you always configure your drives with some level of RAID (Redundant Array of Inexpensive Disks).
What Are the Types of RAID?
RAID 0 (Striping) (Not recommended)
RAID 0 is taking any number of disks and merging them into one large volume. This will greatly increase speeds, as you're reading and writing from multiple disks at a time. An individual file can then use the speed and capacity of all the drives of the array. The downside to RAID 0 though is that it is NOT redundant. The loss of any individual disk will cause complete data loss. This RAID type is very much less reliable than having a single disk.
RAID 1 (Mirroring)
While RAID 1 is capable of a much more complicated configuration, almost every use case of RAID 1 is where you have a pair of identical disks identically mirror/copy the data equally across the drives in the array. The point of RAID 1 is primarily for redundancy. If you completely lose a drive, you can still stay up and running off the additional drive.
In the event that either drive fails, you can then replace the broken drive with little to no downtime. RAID 1 also gives you the additional benefit of increased read performance, as data can be read off any of the drives in the array. The downsides are that you will have slightly higher write latency. Since the data needs to be written to both drives in the array, you'll only have the available capacity of a single drive while needing two drives.
RAID 5/6 (Striping + Distributed Parity)
RAID 5 requires the use of at least 3 drives (RAID 6 requires at least 4 drives). It takes the idea of RAID 0 and stripes data across multiple drives to increase performance. But, it also adds the aspect of redundancy by distributing parity information across the disks. There are many technical resources out there on the Internet that can get down into the details as to how this actually happens. But in short, with RAID 5 you can lose one disk, and with RAID 6 you can lose two disks, and still maintain your operations and data.
RAID 5 and 6 will get you significantly improved read performance. But write performance is largely dependent on the RAID controller used. For RAID 5 or 6, you will most certainly need a dedicated hardware controller. This is due to the need to calculate the parity data and write it across all the disks. RAID 5 and RAID 6 are often good options for standard web servers, file servers, and other general-purpose systems where most of the transactions are reads, and get you a good value for your money. This is because you only need to purchase one additional drive for RAID 5 (or two additional drives for RAID 6) to add speed and redundancy.
RAID 5 or RAID 6 is not the best choice for a heavy write environment, such as a database server, as it will likely hurt your overall performance.
It is worth mentioning that in a RAID 5 or RAID 6 situation if you lose a drive, you're going to be seriously sacrificing performance to keep your environment operational. Once you replace the failed drive, data will need to be rebuilt out of the parity information. This will take a significant amount of the total performance of the array. These rebuild times continue to grow more and more each year, as drives get larger and larger.
RAID 10 (Mirroring + Striping)
RAID 10 requires at least 4 drives and is a combination of RAID 1 (mirroring) and RAID 0 (striping). This will get you both increased speed and redundancy. This is often the recommended RAID level if you're looking for speed, but still need redundancy. In a four-drive configuration, two mirrored drives hold half of the striped data, and another two mirror the other half of the data. This means you can lose any single drive, and then possibly even a 2nd drive, without losing any data. Just like RAID 1, you'll only have the capacity of half the drives, but you will see improved read and write performance. You will also have the fast rebuild time of RAID 1.
Credit: https://www.steadfast.net/blog/almost...
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Technical Support (UK) - https://service.qnap.com/en-uk
Product Compatibility - https://www.qnap.com/en-uk/compatibil...
Where to buy your QNAP NAS
Amazon - http://amzn.to/2NatDB7
SPAN.com - http://bit.ly/3jwMmTq
Broadbandbuyer - https://bit.ly/3cYo6bw
Box.co.uk - http://bit.ly/2YZ5jVj
Ebuyer - http://bit.ly/3oWMxZm
https://nascompares.com/2019/10/23/wh...
We recommend that as well as backing up your data on a regular basis, make sure you always configure your drives with some level of RAID (Redundant Array of Inexpensive Disks).
What Are the Types of RAID?
RAID 0 (Striping) (Not recommended)
RAID 0 is taking any number of disks and merging them into one large volume. This will greatly increase speeds, as you're reading and writing from multiple disks at a time. An individual file can then use the speed and capacity of all the drives of the array. The downside to RAID 0 though is that it is NOT redundant. The loss of any individual disk will cause complete data loss. This RAID type is very much less reliable than having a single disk.
RAID 1 (Mirroring)
While RAID 1 is capable of a much more complicated configuration, almost every use case of RAID 1 is where you have a pair of identical disks identically mirror/copy the data equally across the drives in the array. The point of RAID 1 is primarily for redundancy. If you completely lose a drive, you can still stay up and running off the additional drive.
In the event that either drive fails, you can then replace the broken drive with little to no downtime. RAID 1 also gives you the additional benefit of increased read performance, as data can be read off any of the drives in the array. The downsides are that you will have slightly higher write latency. Since the data needs to be written to both drives in the array, you'll only have the available capacity of a single drive while needing two drives.
RAID 5/6 (Striping + Distributed Parity)
RAID 5 requires the use of at least 3 drives (RAID 6 requires at least 4 drives). It takes the idea of RAID 0 and stripes data across multiple drives to increase performance. But, it also adds the aspect of redundancy by distributing parity information across the disks. There are many technical resources out there on the Internet that can get down into the details as to how this actually happens. But in short, with RAID 5 you can lose one disk, and with RAID 6 you can lose two disks, and still maintain your operations and data.
RAID 5 and 6 will get you significantly improved read performance. But write performance is largely dependent on the RAID controller used. For RAID 5 or 6, you will most certainly need a dedicated hardware controller. This is due to the need to calculate the parity data and write it across all the disks. RAID 5 and RAID 6 are often good options for standard web servers, file servers, and other general-purpose systems where most of the transactions are reads, and get you a good value for your money. This is because you only need to purchase one additional drive for RAID 5 (or two additional drives for RAID 6) to add speed and redundancy.
RAID 5 or RAID 6 is not the best choice for a heavy write environment, such as a database server, as it will likely hurt your overall performance.
It is worth mentioning that in a RAID 5 or RAID 6 situation if you lose a drive, you're going to be seriously sacrificing performance to keep your environment operational. Once you replace the failed drive, data will need to be rebuilt out of the parity information. This will take a significant amount of the total performance of the array. These rebuild times continue to grow more and more each year, as drives get larger and larger.
RAID 10 (Mirroring + Striping)
RAID 10 requires at least 4 drives and is a combination of RAID 1 (mirroring) and RAID 0 (striping). This will get you both increased speed and redundancy. This is often the recommended RAID level if you're looking for speed, but still need redundancy. In a four-drive configuration, two mirrored drives hold half of the striped data, and another two mirror the other half of the data. This means you can lose any single drive, and then possibly even a 2nd drive, without losing any data. Just like RAID 1, you'll only have the capacity of half the drives, but you will see improved read and write performance. You will also have the fast rebuild time of RAID 1.
Credit: https://www.steadfast.net/blog/almost...
Follow us on twitter - Twitter: QNAP_nas
Like us on Facebook - Facebook: qnapuk
Follow us on Instagram - Instagram: qnap_uk
Visit our website – https://www.qnap.com/en-uk
Technical Support (UK) - https://service.qnap.com/en-uk
Product Compatibility - https://www.qnap.com/en-uk/compatibil...
Where to buy your QNAP NAS
Amazon - http://amzn.to/2NatDB7
SPAN.com - http://bit.ly/3jwMmTq
Broadbandbuyer - https://bit.ly/3cYo6bw
Box.co.uk - http://bit.ly/2YZ5jVj
Ebuyer - http://bit.ly/3oWMxZm
https://nascompares.com/2019/10/23/wh...
4 سال پیش
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