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2 Posts

04-09-2010

USA

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T61 SSD replacement

2010-04-09, 18:51 PM
I have a T61 (6459CTO) with a 160GB 7200 rpm HDD in it. I'd like to put in an SSD. I know that I can do that but what I'm wondering is if I clone my current drive to the new SSD and put that in, will I be all set? I don't want to reinstall anything. Just want to clone the current drive to the SSD. Has anyone done this? Any feedback? Thanks.
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9380 Posts

11-27-2007

Slovakia

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Re: T61 SSD replacement

2010-04-09, 20:05 PM

avianrand, welcome to the forum,

 

I've done it, not for myself, but for someone else. Just ensure that the SSD is inserted into your T61 and clone to it from an Acronis rescue disc, (my favourite choice), with the original drive in an usb caddy. Cloning manually you will be able to adjust the size of the service partition to the same as beforehand, Acronis will try to adjust the size  -larger / smaller - accordingly depending on the capacity of the SSD.

 

It is also important that when Acronis is finished and the system reboots that you enter BIOS and then shut the system off by pressing the power button untill it shuts down, disconnect the usb caddy and when starting remove the rescue disk. All should work as was :smileyhappy:

 

Good luck

Andy  

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4481 Posts

12-02-2007

United States of America

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Re: T61 SSD replacement

2010-04-10, 9:43 AM

Hello,

 

Conventional hard disk drives typically address their disks in 512 byte blocks of space called sectors.¹ So, if you have a 512-byte file, it occupies one sector on the disk, while a 513-byte file would occupy two sectors on the disk, with the second sector containing the single 513th byte of the file. Hard disk drive capacities have become so large over the years that keeping track which sectors are in use by a file on a sector-by-sector basis is impractical (it would require a measurable percentage of the disk's space to create a table to hold the information, and greatly slow down file access to perform lookups) so modern file systems typically group sectors into minimum clusters of sectors that a file can occupy, based on the capacity of the formatted disk volume. A small disk volume formatted with the FAT file system might use a cluster size of 4KB (e.g., 8×512 bytes) while a larger disk volume might use a cluster size of 64KB (e.g., 128×512 bytes). The NTFS file system typically uses a cluster size of 4KB for most disk volumes, though.²

 

Solid-State Drives, on the other hand, allocate bytes in 4KB pages due to their underlying NAND RAM architecture, and thus it is optimal for them to use a 4KB sector size, and a cluster size that is a multiple of 4 (a cluster of one 4KB sector is valid). There are some additional issues as well with how pages are allocated and deallocated (deleted) that, over time, can lead to transfer speeds slowing down over time, proximate to how fragmentation affects conventioal hard disk drives. A disk I/O command called TRIM allows SSDs to periodically "clean up" the pages leftover after multiple file operations and maintain performance. The latest generation of disk defragmentation programs from Raxco and Diskeeper (and probably other disk defragmentation software companies) also claim to optimize the use of space on SSDs, as well.

 

In some cases, it may be possible to "align" the cluster sizes on a SSD that was set up with—or cloned from—conventional HDD file system settings to the optimal file system configuration for SSD use. Since there may be some variation in optimal settings between different brands and models of of SSDs, it is probably best to check with the manufacturer's technical support department to see what the recommended steps are for cloning a hard disk drive to a solid-state drive.

 

Regards,

 

Aryeh Goretsky

 

¹Some old SCSI hard disk drives use 576 byte sectors (512 byte + 64 byte parity) and some very new "Advanced Format" hard disk drives are coming out that use use 4,096 byte sectors as well.

²See Microsoft Knowledgebase Article #140365, "Default cluster size for NTFS, FAT, and exFAT" for more information.

 



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