Install SSD in Optical drive bay or Hard drive bay?

ajhokayem · Nov 15, 2015

Hello everyone, newbie here. I am planning on putting an SSD in place of my optical drive in my laptop. I already have an SSHD in the hard drive bay. My question is; will the SSD bottleneck in the optical drive due to the SATA bandwidth? The optical drive has a SATA bandwidth of 1.5 gb/s, and the SSD im looking at can read and write at about 500mb/s. Wouldnt 1.5 gb/s be more than enough for the SSD to perform well? Or should i place the SSD in the hard drive bay that has a SATA bandwidth of 6gb/s and put the SSHD in the Optical drive?

Appreciate the help

drtweak · Nov 15, 2015

The 1.5Gb comes out to roughtly 150MB per second so yes it will bottleneck it A LOT. Now the question is does the Hard bay also SATA 1.5Gb or is it 3 or 6?

ajhokayem · Nov 15, 2015

drtweak :

I dont understand, how does 1.5 gb/s (1500mb) come up to 150 mb/s? And the Hard drive bay has a SATA 6gb/s

drtweak · Nov 15, 2015

No no no

it is 1.5Gb see how the b is little? Just like internet Speeds you pay for MEGA BITS! Not MEGA BYTES. So if it is 1.5 Giga BITS you divide that number by 8 since there are 8 bits in a byte to get the other speed. So it is more like 187 Mega BYTES per second where as SATA 3 and SATA 6 are 375 and 750 but then you also have to see how PC see Megabytes VS what Megabytes is advertised as.

PC's run everything on Base 2. So everything is 2 4 8 16 32 34 128 256 512 1024 so 1024 bytes is a kilobyte not 1000 which is what hard drive makes sell their hard drives as. Every wonder why a 320 GB hard drive is really 300 or a 500 GB is 465 and so on? Because to them 1 GB is 1,000,000,000 bytes where as the PC sees 1GB as 1073741824 bytes.

So if the Hard drive bay is really SATA 6Gb and the new Optical Bay drive caddy is only 1.5Gb i would put the SSHD in the caddy and then put the SSD in the hard drive bay to get its full power.

The PC world has a lot of termanology. Things like Giga Transfers, Flops, etc that most people have no idea what it means and people then mistake what they really mean. So in the future pay attention to things like Gb and GB as one is Gigabits and one is Gigabytes.

ajhokayem · Nov 15, 2015

drtweak :

No no no

it is 1.5Gb see how the b is little? Just like internet Speeds you pay for MEGA BITS! Not MEGA BYTES. So if it is 1.5 Giga BITS you divide that number by 8 since there are 8 bits in a byte to get the other speed. So it is more like 187 Mega BYTES per second where as SATA 3 and SATA 6 are 375 and 750 but then you also have to see how PC see Megabytes VS what Megabytes is advertised as.

PC's run everything on Base 2. So everything is 2 4 8 16 32 34 128 256 512 1024 so 1024 bytes is a kilobyte not 1000 which is what hard drive makes sell their hard drives as. Every wonder why a 320 GB hard drive is really 300 or a 500 GB is 465 and so on? Because to them 1 GB is 1,000,000,000 bytes where as the PC sees 1GB as 1073741824 bytes.

So if the Hard drive bay is really SATA 6Gb and the new Optical Bay drive caddy is only 1.5Gb i would put the SSHD in the caddy and then put the SSD in the hard drive bay to get its full power.

The PC world has a lot of termanology. Things like Giga Transfers, Flops, etc that most people have no idea what it means and people then mistake what they really mean. So in the future pay attention to things like Gb and GB as one is Gigabits and one is Gigabytes.

that makes alot of sense. Thanks for the help, appreciate it

drtweak · Nov 15, 2015

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