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Now I am asking the same questions posed in the video
i) How long Will an average SSD drive Last ?
ii) Does it mean that ordinary SSD drives (non enterprise class SSD drives) manufactured by crucial or any other manufacturer last only 3 years (If used on a 24 x 7 basis)?
iii) Why normal SSD drives are not given 5 years warranty ?
iv) Why even brand new SSD drives (non enterprise class SSD drives) doesn't meet manufacturers specifications that are advertised ?
v) With conventional Hard disks we can know the source of degradation such as Electro magnetic interference , Physical damage ,Head parking etc is there any such method for ordinary SSDs (non enterprise class SSD drives)?
vi) Is there any technology such as SMART for SSD's ?
Depends on your use case. If you have many writes it will have a shorter lifetime than a disk that is almost only read from.
Quote:
ii) Does it mean that ordinary SSD drives (non enterprise class SSD drives) manufactured by crucial or any other manufacturer last only 3 years (If used on a 24 x 7 basis)?
No. As an example, I use one of the first consumer SSDs (X25-V) from Intel in my laptop, for over 2 years now (7094 hours power on reported from the drive). The disk reports that I have written 2311GB off data to it in its lifetime, nonetheless the wearout indicator is still 98 (from original 100), so the disk will work for many years when not changing the type of use.
Quote:
iii) Why normal SSD drives are not given 5 years warranty ?
Because the manufacturer decided that way. In the same way as many of them decided that they give only 1 year warranty for conventional disks. That says nothing about the expected lifetime.
Quote:
iv) Why even brand new SSD drives (non enterprise class SSD drives) doesn't meet manufacturers specifications that are advertised ?
Because it is advertising, they show up the specifications that can be reached under the best possible situation in a synthetic benchmark. As always, benchmarks differ from the real world.
Quote:
v) With conventional Hard disks we can know the source of degradation such as Electro magnetic interference , Physical damage ,Head parking etc is there any such method for ordinary SSDs (non enterprise class SSD drives)?
That you know the source of the degradation does not mean that you can determine the lifetime from that. The source of degradation is for SSDs the wearout of individual cells.
Quote:
vi) Is there any technology such as SMART for SSD's ?
Pressure by factory or management to rush out new technologies to unsuspecting public.
If you look at many of the ssd reviews by real users, you still find a lot of unhappy customers. The issue also is compounded in some part by motherboard and os timings. Faster is not always better.
I read one review that suggested that the backup plan was the solution to poor quality/fast drive.
I watched about ten minutes of the video then decided not to waste any more of my time. Apples & oranges comparisons. Poor test bench setup. Whiz Bang!
Quote:
Originally Posted by sulekha
Now I am asking the same questions posed in the video
i) How long Will an average SSD drive Last ?
Look at manufactures test details. Reputable reviews like tomshardware.com
Quote:
Originally Posted by sulekha
ii) Does it mean that ordinary SSD drives (non enterprise class SSD drives) manufactured by crucial or any other manufacturer last only 3 years (If used on a 24 x 7 basis)?
No, it will depend heavily on the 'SSD' controller and how you set up to use the drive.
Quote:
Originally Posted by sulekha
Why normal SSD drives are not given 5 years warranty ?
Manufactures establish this.
Quote:
Originally Posted by sulekha
Why even brand new SSD drives (non enterprise class SSD drives) doesn't meet manufacturers specifications that are advertised ?
This will depend on how your system is configured. Numbers from manufactures and differences compared to your system setup. How are your systems configured to use 'SSD'. Kernel configuration & system configuration for the 'SSD' will dictate the numbers. Hard to implement the numbers. In the video the user used a Esata interface at times with other test used external cases. Part of the review did test the supposedly working crucial drives. This will depend on the 'SSD' controller being used and how the 'kernel' scheduler selected works with the 'SSD'.
Quote:
Originally Posted by sulekha
v) With conventional Hard disks we can know the source of degradation such as Electro magnetic interference , Physical damage ,Head parking etc is there any such method for ordinary SSDs (non enterprise class SSD drives)?
yes, you can get the drive information from the 'SSD'. 'man smartctl';
Quote:
smartctl - Control and Monitor Utility for SMART Disks
SYNOPSIS
smartctl [options] device
FULL PATH
/usr/sbin/smartctl
PACKAGE VERSION
smartmontools-5.43 2012-06-30 r3573
DESCRIPTION
[This man page is generated for the Linux version of smartmontools. It does not contain info specific to other platforms.]
smartctl controls the Self-Monitoring, Analysis and Reporting Technology (SMART) system built into many ATA-3 and later ATA, IDE and SCSI-3 hard
drives. The purpose of SMART is to monitor the reliability of the hard drive and predict drive failures, and to carry out different types of drive
self-tests. This version of smartctl is compatible with ATA/ATAPI-7 and earlier standards (see REFERENCES below)
smartctl is a command line utility designed to perform SMART tasks such as printing the SMART self-test and error logs, enabling and disabling SMART
automatic testing, and initiating device self-tests. Note: if the user issues a SMART command that is (apparently) not implemented by the device,
smartctl will print a warning message but issue the command anyway (see the -T, --tolerance option below). This should not cause problems: on most
devices, unimplemented SMART commands issued to a drive are ignored and/or return an error.
smartctl also provides support for polling TapeAlert messages from SCSI tape drives and changers.
The user must specify the device to be controlled or interrogated as the final argument to smartctl. The command set used by the device is often
derived from the device path but may need help with the ´-d´ option (for more information see the section on "ATA, SCSI command sets and SAT" below).
Device paths are as follows:
LINUX: Use the forms "/dev/hd[a-t]" for IDE/ATA devices, and "/dev/sd[a-z]" for SCSI devices. For SCSI Tape Drives and Changers with TapeAlert sup-
port use the devices "/dev/nst*" and "/dev/sg*". For SATA disks accessed with libata, use "/dev/sd[a-z]" and append "-d ata". For disks
behind 3ware controllers you may need "/dev/sd[a-z]" or "/dev/twe[0-9]", "/dev/twa[0-9]" or "/dev/twl[0-9]": see details below. For disks
behind HighPoint RocketRAID controllers you may need "/dev/sd[a-z]". For disks behind Areca SATA RAID controllers, you need "/dev/sg[2-9]"
(note that smartmontools interacts with the Areca controllers via a SCSI generic device which is different than the SCSI device used for read-
ing and writing data)! For HP Smart Array RAID controllers, there are three currently supported drivers: cciss, hpsa, and hpahcisr. For
disks accessed via the cciss driver the device nodes are of the form "/dev/cciss/c[0-9]d0". For disks accessed via the hpahcisr and hpsa
drivers, the device nodes you need are "/dev/sg[0-9]*". ("lsscsi -g" is helpful in determining which scsi generic device node corresponds to
which device.) Use the nodes corresponding to the RAID controllers, not the nodes corresponding to logical drives. See the -d option below,
as well.
Quote:
Originally Posted by sulekha
vi) Is there any technology such as SMART for SSD's ?
Modern 'SSD' using newer controllers will last a good period. This will depend on the user's ability to configure their system to use the 'SSD'. My 'SSD' use will out last the system life.
Too much 'FUD' out there to confuse users! Confirm!
HTH!
What do you wish to gain from these choices? Not sure you can get fastest, cheapest, most reliable longest lasting and most stable all in one product.
You can get reliable ssd's in enterprise level products. They still may have issues but big name companies like intel offer products designed for server work. They may not be as good for game or desktop but tend to be used in high use server rooms.
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