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Replacement hard disk for Lenovo G50-45 model 80E30181US
I looked at the specs
http://psref.lenovo.com/syspool/Sys/...ifications.pdf and it mentions SSHD with 8GB NAND flash memory. 1. Will any 2.5inch SSD work with the Lenovo 50-45 model 80E30181US laptop? 2. Is any brand like Western Digital better than others like Samsung for SSDs or they are pretty much the same quality? 3. Do I need the mount bundle shown at with the SSD https://www.amazon.com/Samsung-2-5-I.../dp/B00OAJ412U Any suggestions would be appreciated. |
#2
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Replacement hard disk for Lenovo G50-45 model 80E30181US
t wrote:
I looked at the specs http://psref.lenovo.com/syspool/Sys/...ifications.pdf and it mentions SSHD with 8GB NAND flash memory. 1. Will any 2.5inch SSD work with the Lenovo 50-45 model 80E30181US laptop? 2. Is any brand like Western Digital better than others like Samsung for SSDs or they are pretty much the same quality? 3. Do I need the mount bundle shown at with the SSD https://www.amazon.com/Samsung-2-5-I.../dp/B00OAJ412U Any suggestions would be appreciated. The 850 EVO is TLC (V-NAND). MLC like V-NAND would be better. One reason it's better, is TLC writes in two stages, and can be using an SLC-like cache area for the original write, followed by a slower write to actual TLC cells later. When an MLC drive writes, it writes directly to MLC. There are some subtle differences with how TLC works in practice. You're welcome at this point, to stick your fingers in your ears and sing "LaLaLa". http://techreport.com/review/27464/s...drive-reviewed Of course, the drive bay in that machine might be SATA II, which means the SSD won't necessarily bench its best numbers while in the laptop. It's probably better not to benchmark it anyway - as looking at the results will only make you angry :-) I find myself quite annoyed, when looking at the wide variation in results. This only matters if you run an "SSD-only" shop and notice your drive-to-drive performance is sucky. A single-drive in a machine, nobody is going to know. ******* You want to stay within the power footprint of the drive bay. Your spec makes no mention of what limits the bay might have. It doesn't even tease us with a "5400 RPM only" type spec, which is normally a hint the drive bay gets hot. SSDs with Sandforce controllers, can have high peak power (due to the controller compressing the data before writing it). Lots of drives do compression, which is why the benchmarks vary when writing a large file full of zeros, versus a large file filled with "random" uncompressible data. In my case, I measured the actual power while doing operations on it - the foot print on mine is under 2.5W so it's safe for me to run it on a USB2 enclosure. The power spec printed on the tin, is frequently useless for the job. I recommend finding a review site that has measured the power under benchmark conditions, just so you have some idea how much hotter than a hard drive it can get. My SSD never gets hot to the touch, but there's airflow inside the mid-tower case, and by the time I get the side off the case, I might not be getting good feedback. Some flash drives now use metal cases, and use a sil-pad to conduct heat from internal chips, to the metal. Maybe the controller chip gets that treatment, or all the chips do. ******* There's nothing in the spec that hints at a special requirement. There is no mention of an accelerometer in the hard drive, to make the device "drop-resistant". The publish date of the document, is modern enough that SSD drives as an option should have been mentioned. I don't know if this is an attempt at a "subtle power dig" or not. ******* In effect, as the "engineer" on this job, your job is to make sure the power level of the new storage solution, is not violating some (undocumented) power limits in the design. Some Sandforce drives, might have power spikes as high as seven watts. Lots of other drives, the power is low enough, you might safely run them on a USB adapter. The "devsleep" listing on the tin, while a nice-to-have spec when idle in the desktop, tells you nothing about making the drive bay too hot. A little heat doesn't kill Flash - high temps tend to "anneal" damage better, but high temps might also shorten retention time or something (might be more of an issue near end of life). You can probably find a tech article discussing the trade-offs. The article you quoted, has load power, and the 250GB SSD drive is 1.9W. You can compare that to a 2.5" hard drive (a wd10spzx is 1.5W at 5400RPM, during read or write, as a comparison, while a wd10jplx is 1.8-2W at 7200RPM). Your SSD is in the same ballpark, on a write. And there are web sites that measure the power, so you should be able to get some actual data on them, somewhere. On my laptop, my battery life was cut in half when I installed an SSD - but I was also switching from Win7 to Win10, which completely invalidates the results :-) With Win10, the fan on the laptop actually goes off, if the network cable is disconnected. The battery life is strongly affected by whether Win10 can "do its maintenance thing" and beat the **** out of the battery. I'm pretty sure the Win10 power is actually lower than the Win7 power... as long as the network cable stays disconnected. The very definition of "useless". I didn't bother doing any A/B testing with Win7 alone, which would have been a more sensible thing to do. It wasn't my intention to bench the thing, and the only reason I mention it, is it was affecting usability. Paul |
#3
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Replacement hard disk for Lenovo G50-45 model 80E30181US
On 11/7/2017 5:27 AM, Paul wrote:
t wrote: I looked at the specs http://psref.lenovo.com/syspool/Sys/...ifications.pdf and it mentions SSHD with 8GB NAND flash memory. 1. Will any 2.5inch SSD work with the Lenovo 50-45 model 80E30181US laptop? 2. Is any brand like Western Digital better than others like Samsung for SSDs or they are pretty much the same quality? 3. Do I need the mount bundle shown at with the SSD https://www.amazon.com/Samsung-2-5-I.../dp/B00OAJ412U Any suggestions would be appreciated. The 850 EVO is TLC (V-NAND). MLC like V-NAND would be better. One reason it's better, is TLC writes in two stages, and can be using an SLC-like cache area for the original write, followed by a slower write to actual TLC cells later. When an MLC drive writes, it writes directly to MLC. There are some subtle differences with how TLC works in practice. You're welcome at this point, to stick your fingers in your ears and sing "LaLaLa". http://techreport.com/review/27464/s...drive-reviewed Of course, the drive bay in that machine might be SATA II, which means the SSD won't necessarily bench its best numbers while in the laptop. It's probably better not to benchmark it anyway - as looking at the results will only make you angry :-) I find myself quite annoyed, when looking at the wide variation in results. This only matters if you run an "SSD-only" shop and notice your drive-to-drive performance is sucky. A single-drive in a machine, nobody is going to know. ******* You want to stay within the power footprint of the drive bay. Your spec makes no mention of what limits the bay might have. It doesn't even tease us with a "5400 RPM only" type spec, which is normally a hint the drive bay gets hot. SSDs with Sandforce controllers, can have high peak power (due to the controller compressing the data before writing it). Lots of drives do compression, which is why the benchmarks vary when writing a large file full of zeros, versus a large file filled with "random" uncompressible data. In my case, I measured the actual power while doing operations on it - the foot print on mine is under 2.5W so it's safe for me to run it on a USB2 enclosure. The power spec printed on the tin, is frequently useless for the job. I recommend finding a review site that has measured the power under benchmark conditions, just so you have some idea how much hotter than a hard drive it can get. My SSD never gets hot to the touch, but there's airflow inside the mid-tower case, and by the time I get the side off the case, I might not be getting good feedback. Some flash drives now use metal cases, and use a sil-pad to conduct heat from internal chips, to the metal. Maybe the controller chip gets that treatment, or all the chips do. ******* There's nothing in the spec that hints at a special requirement. There is no mention of an accelerometer in the hard drive, to make the device "drop-resistant". The publish date of the document, is modern enough that SSD drives as an option should have been mentioned. I don't know if this is an attempt at a "subtle power dig" or not. ******* In effect, as the "engineer" on this job, your job is to make sure the power level of the new storage solution, is not violating some (undocumented) power limits in the design. Some Sandforce drives, might have power spikes as high as seven watts. Lots of other drives, the power is low enough, you might safely run them on a USB adapter. The "devsleep" listing on the tin, while a nice-to-have spec when idle in the desktop, tells you nothing about making the drive bay too hot. A little heat doesn't kill Flash - high temps tend to "anneal" damage better, but high temps might also shorten retention time or something (might be more of an issue near end of life). You can probably find a tech article discussing the trade-offs. The article you quoted, has load power, and the 250GB SSD drive is 1.9W. You can compare that to a 2.5" hard drive (a wd10spzx is 1.5W at 5400RPM, during read or write, as a comparison, while a wd10jplx is 1.8-2W at 7200RPM). Your SSD is in the same ballpark, on a write. And there are web sites that measure the power, so you should be able to get some actual data on them, somewhere. On my laptop, my battery life was cut in half when I installed an SSD - but I was also switching from Win7 to Win10, which completely invalidates the results :-) With Win10, the fan on the laptop actually goes off, if the network cable is disconnected. The battery life is strongly affected by whether Win10 can "do its maintenance thing" and beat the **** out of the battery. I'm pretty sure the Win10 power is actually lower than the Win7 power... as long as the network cable stays disconnected. The very definition of "useless". I didn't bother doing any A/B testing with Win7 alone, which would have been a more sensible thing to do. It wasn't my intention to bench the thing, and the only reason I mention it, is it was affecting usability. Paul Thanks Paul, This is very helpful. I appreciate your advice. |
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