Redesigned 2017 Lexus IS
06-13-16, 03:47 PM
#331
NO, it is much SLOWER, multiple times slower.
I have SD in my PC, I have no HD anymore, my Windows boot up in 5-10 sec comparing to a typical HD boot of close to a minute. Plus SD doesn't suffer from defragmentation problems. People who buy PCs these days with HD are those who can't afford an SD or they have monumental storage requirements and SD would be economically impossible.
I have SD in my PC, I have no HD anymore, my Windows boot up in 5-10 sec comparing to a typical HD boot of close to a minute. Plus SD doesn't suffer from defragmentation problems. People who buy PCs these days with HD are those who can't afford an SD or they have monumental storage requirements and SD would be economically impossible.
06-14-16, 10:39 AM
#332
NO, it is much SLOWER, multiple times slower.
I have SD in my PC, I have no HD anymore, my Windows boot up in 5-10 sec comparing to a typical HD boot of close to a minute. Plus SD doesn't suffer from defragmentation problems. People who buy PCs these days with HD are those who can't afford an SD or they have monumental storage requirements and SD would be economically impossible.
I have SD in my PC, I have no HD anymore, my Windows boot up in 5-10 sec comparing to a typical HD boot of close to a minute. Plus SD doesn't suffer from defragmentation problems. People who buy PCs these days with HD are those who can't afford an SD or they have monumental storage requirements and SD would be economically impossible.
The cards used in the Lexus Navigation systems are SD speed class 4, which is approximately 4 MB/sec. The fastest SD cards are UHS Class 3, which is 30 MB/sec.
Compare that to a standard-type 5400rpm or 7200rpm laptop hard drive which will average somewhere around 100-125 MB/sec. or something like the SSD in a computer which can hit over 500 MB/sec.
tl;dr: SD cards are way slower than hard drives and way way slower than SSD's.
Jeff
06-14-16, 10:55 AM
#333
Lexus Test Driver
SD is not SSD. SD = Secure Digital, SSD = Solid State Drive. Even though an SD card is solid state memory, it is in fact quite a bit slower than most hard drives or SSD's.
The cards used in the Lexus Navigation systems are SD speed class 4, which is approximately 4 MB/sec. The fastest SD cards are UHS Class 3, which is 30 MB/sec.
Compare that to a standard-type 5400rpm or 7200rpm laptop hard drive which will average somewhere around 100-125 MB/sec. or something like the SSD in a computer which can hit over 500 MB/sec.
tl;dr: SD cards are way slower than hard drives and way way slower than SSD's.
Jeff
The cards used in the Lexus Navigation systems are SD speed class 4, which is approximately 4 MB/sec. The fastest SD cards are UHS Class 3, which is 30 MB/sec.
Compare that to a standard-type 5400rpm or 7200rpm laptop hard drive which will average somewhere around 100-125 MB/sec. or something like the SSD in a computer which can hit over 500 MB/sec.
tl;dr: SD cards are way slower than hard drives and way way slower than SSD's.
Jeff
Adequate for the intended use, with the advantage of improved "security" through device ID and once locked, they cannot be modified without invalidating the Device ID.
06-14-16, 12:49 PM
#334
Correct, even if I were wrong about the speed of the particular device in question the fact remains that hard drive in a car these days is a relic because of its size and moving parts. How many hard drives did NASA ever put on their Mars landers or interplanetary probes - zero.
06-14-16, 01:30 PM
#335
Even with slower transfer rates, generally you aren't transferring very much. What SD cards have that are advantageous is faster access times to the data as hard drives take longer to access the data due to the need to seek.
06-22-16, 09:14 PM
#336
06-24-16, 01:27 PM
#337
Lead Lap
Actually you got it backward. When nav system first came out it was on dvd. Then it was moved to hard disk. Now it's in much smaller form like SD or SSD.
06-25-16, 10:06 AM
#338
SD is not SSD. SD = Secure Digital, SSD = Solid State Drive. Even though an SD card is solid state memory, it is in fact quite a bit slower than most hard drives or SSD's.
The cards used in the Lexus Navigation systems are SD speed class 4, which is approximately 4 MB/sec. The fastest SD cards are UHS Class 3, which is 30 MB/sec.
Compare that to a standard-type 5400rpm or 7200rpm laptop hard drive which will average somewhere around 100-125 MB/sec. or something like the SSD in a computer which can hit over 500 MB/sec.
tl;dr: SD cards are way slower than hard drives and way way slower than SSD's.
Jeff
The cards used in the Lexus Navigation systems are SD speed class 4, which is approximately 4 MB/sec. The fastest SD cards are UHS Class 3, which is 30 MB/sec.
Compare that to a standard-type 5400rpm or 7200rpm laptop hard drive which will average somewhere around 100-125 MB/sec. or something like the SSD in a computer which can hit over 500 MB/sec.
tl;dr: SD cards are way slower than hard drives and way way slower than SSD's.
Jeff
06-25-16, 10:09 AM
#339
Well, the automotive HDDs generally have very small capacities (40GB, 60GB and 80GB) so only a small portion of the disc gets used so the head does not have to search long to read.
06-27-16, 06:19 PM
#341
06-28-16, 07:28 AM
#342
Driver School Candidate
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saw the new 2017 IS on the road over the weekend. white f-sport with NY tags.. i was behind it on the highway in traffic and i was confused for a minute since the rear lights looked like a hybrid between 2014-16 IS and the new GS. looked pretty nice though. they changed the front DRL so it lights up like a bar, not dots. one thing i noticed is that the headlights were located horizontally in the middle of DRL instead of at the ends like the pre-refresh IS (unless the person had high beams on which i doubt). don't know why but for some reason it didn't look good.. oh well.. 
06-28-16, 07:47 AM
#343
Pole Position
saw the new 2017 IS on the road over the weekend. white f-sport with NY tags.. i was behind it on the highway in traffic and i was confused for a minute since the rear lights looked like a hybrid between 2014-16 IS and the new GS. looked pretty nice though. they changed the front DRL so it lights up like a bar, not dots. one thing i noticed is that the headlights were located horizontally in the middle of DRL instead of at the ends like the pre-refresh IS (unless the person had high beams on which i doubt). don't know why but for some reason it didn't look good.. oh well..
06-28-16, 08:57 AM
#344
Lexus Test Driver
If I could give a grade for this mid model refresh, i'd give it a solid Fail. It got uglier and its just as slow while the competitors amped up their lineup (335-->340; Q50 RS with 400hp). Complete FAIL Lexus...
