How many hard drives can be connected to a single SAS cable?

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How many hard drives can be connected to a single SAS cable?

SAS controllers overcome this 1:1 port/drive constraint by leveraging expander technology. Instead of being limited to a maximum of eight drives on an eight-port SATA controller, an eight-port SAS controller supports the connection of up to 128 SATA and/or SAS drives per port.

Can you mix SATA and SAS drives in RAID?

Distinguished. While you can use a combination of SAS and SATA hard drives running on the same controller, you cannot mix them in the same array. This means that if the hard drives are configured together in any sort of array, you would need to replace that SAS hard drive with an identical SAS hard drive.

Can you RAID 2 external hard drives?

While you often can combine multiple external hard drives, there can be problems doing so. If the controller hardware differs between the two, they may not be able to be combined (or behave poorly even if you can combine them). And as these are older USB drives, as part of a RAID they’re going to be very slow.

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Why is RAID a bad idea?

RAID doesn’t solve the home storage problem and its usability stinks. The vendors who are backing off from selling or promoting RAID in the home are doing the right thing. Consumers don’t want RAID, they want to protect their data. RAID isn’t the right tool for consumers because it doesn’t meet consumer needs.

Can you use SAS drives with a SATA controller?

The use of SATA hard drives on SAS controllers is made possible by the fact that both share the same infrastructure and have similar features. SATA drives may be plugged into SAS controllers. SAS drives cannot be plugged into SATA controllers.

Can you mix SSD and HDD in RAID?

Do not mix SSDs and HDDs within the same disk array. A disk array must only contain SSDs or HDDs. It is preferred that SSDs be protected by RAID 5, RAID 6, RAID 10, or by system mirroring.

Is RAID 1 A good backup solution?

One very important thing to note, RAID 1 is not a backup in and of itself. Although RAID writes data to two disks simultaneously, it is not a backup. If your operating system or software, rather than the hard disk, corrupts your data, this corrupted data is sent to both disks and simultaneously corrupts both drives.

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Is RAID 1 a good idea?

What good is RAID 1 then? If you have a lot of users requesting the same files from the same machine, a RAID 1 setup would be good as it offers high read speeds (since the data is mirrored across X amount of drives, it can be accessed that much faster by multiple users).

Why RAID 1 is not a substitute for a backup?

RAID has well documented data protection capabilities, but it is not a fail-safe solution for data corruption. As we discussed in a previous post, RAID can actually make matters worse by replicating the damage throughout the array. Even a good backup plan may be challenged if copies of the corrupt files are made.

Is RAID best for backup?

While RAID arrays can provide enhanced data protection, their extra disks should not be considered as backups. If your main drive is a RAID array, you still need to back it up. If you have, say, 12 TB storage on a RAID array, you’ll want to back it up to another device.

Can I mix SAS and SATA drives on a PERC controller?

The Perc Controller configuration you have shown would be fine. You can mix SAS and SATA drives on the controller, it can handle both. You can have SAS arrays and SATA arrays present on the same controller. You can NOT have SAS and SATA drives present in the SAME array though.

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Can you plug a SAS drive into a SATA port?

You can plug the SATA drives into the SAS port but you cannot plug the SAS drive into the SATA port. SAS ports share the same infrastructure and have similar functions, thus SATA hard drives can be used on SAS ports. Is SAS better than SATA? Yes, the SAS hard drive is better than the SATA drive.

What is the maximum capacity of a SAS hard drive?

SAS Hard Drive Capacity As for the capacity of SAS drive, it ranges from 300GB to up to 900GB. If you want to increase the hard drive capacity, then this post – Increase Hard Drive Capacity with Free Disk Cloning Software is what you need. Western Digital New Enterprise SAS SSD Reaches up to 15TB

Is there such a thing as an expensive SAS NAS?

Yeah, an “Inexpensive SAS NAS” is a contradiction in terms. Per port, SAS is more expensive than SATA. Even with free SAS hard drives, you need to purchase a SAS HBA to connect them. There are a few motherboards ‘out there’ with SAS (instead of just SATA) connectivity, but they’re not cheap either.