"Breaking in" a SSD?

[98cwitr]

So I was afraid I had gotten a bad one. For the first few days my SSD got slower and slower, about 3MB avg per day and then leveled out. Is it possible for an MLC device to get slower and then stop slowing down?

[sydbat]

So I was afraid I had gotten a bad one. For the first few days my SSD got slower and slower, about 3MB avg per day and then leveled out. Is it possible for an MLC device to get slower and then be stop slowing down?Maybe it's a file system issue. How have you formatted it?

[98cwitr]

ext4

[cascade9]

It could be an alignment issue-

http://thunk.org/tytso/blog/2009/02/20/aligning-filesystems-to-an-ssds-erase-block-size/

[98cwitr]

ill check this with parted when I get home

[98cwitr]

um...(512*2) != 1049k so does that mean my drive is not aligned


brett@brett-desktop:~$ sudo parted
GNU Parted 2.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: ATA Mushkin MKNSSDCL (scsi)
Disk /dev/sda: 60.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 1049kB 57.5GB 57.5GB primary ext4 boot
2 57.5GB 60.0GB 2497MB extended
5 57.5GB 60.0GB 2497MB logical linux-swap(v1)



when I look at the partition with gparted, the first sector starts at 2048 and through 112351231

[andrewabc]

You have Mushkin 60GB SSD?
So it's sandforce controller.

When you say 3mb/s is that read or write?
Are you constantly benchmarking it (specifically write benchmarks)? Don't do that as it slows it down.

Your alignment looks ok. Read: Partition alignment for OCZ Vertex in Linux (http://www.ocztechnologyforum.com/forum/showthread.php?p=373226#post373226)

Go to verify result section to see if similar to what they have.


Number Start End Size Type File system Flags
1 1049kB 57.5GB 57.5GB primary ext4 boot
The start of 1049 looks wrong. Shouldn't it be 1024? I think that is your problem. Although odd that gparted says 2048 is start position. Still no confirmation from anyone whether 10.04 aligns SSD properly by default.

[Shining Arcanine]

You have Mushkin 60GB SSD?
So it's sandforce controller.

When you say 3mb/s is that read or write?
Are you constantly benchmarking it (specifically write benchmarks)? Don't do that as it slows it down.

Your alignment looks ok. Read: Partition alignment for OCZ Vertex in Linux (http://www.ocztechnologyforum.com/forum/showthread.php?p=373226#post373226)

Go to verify result section to see if similar to what they have.


The start of 1049 looks wrong. Shouldn't it be 1024? I think that is your problem. Although odd that gparted says 2048 is start position. Still no confirmation from anyone whether 10.04 aligns SSD properly by default.

Gparted does that because it is mimicking the Windows 7 behavior, which is to start at sector 2048. You can use any multiple of 1024 as a starting sector, although using sector 1024 minimizes wasted space.

[98cwitr]

I have only done read benchmarks. I started at 264MBps avg. I was @ 249.6 yesterday and just pulled 250.7. It has been around this number for a week or so without much fluctuation.

See post #53
http://ubuntuforums.org/showthread.php?t=1468995

[andrewabc]

I have only done read benchmarks. I started at 264MBps avg. I was @ 249.6 yesterday and just pulled 250.7. It has been around this number for a week or so without much fluctuation.

See post #53
http://ubuntuforums.org/showthread.php?t=1468995

Where did you see your 3mb/s speed?
Even if not aligned, it should be almost 100mb/s at least.

[98cwitr]

Where did you see your 3mb/s speed?
Even if not aligned, it should be almost 100mb/s at least.

no no, it was decreasing at a rate of 3 MBps per day on average and now has stabilized at 250ish.