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Dell Mini 9 Hardware and Upgrades Discuss Dell Mini 9 Hardware and Upgrades.
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(#11)
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(#12)
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(#13)
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(#15)
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![]() Please restrict replies for this thread to the topic at hand - the upgrade guide. Comments on the attributes of the RunCore SSDs can go elsewhere.
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(#16)
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![]() Great Guide! However, I would like to point out that users who want to image an existing operating system onto a new RunCore SSD should be aware of the issue of partition alignment. The OCZ forums have extensive information on that, particularly for XP systems. Should a user wish to align the RunCore's partition prior to restoring an existing installation, he/she should NOT use Acronis True Image, as that software is known to destroy the partition's (aligned) offset during the process.
I currently have an OCZ Core v.2 SSD on my desktop. After performing the alignment, I restored onto it using DriveImageXML, then rechecked the disk geometry using Diskpar, and confirmed that the aligned partition held. Aligning the OCZ seemed to lengthen the boot time slightly and did not eliminate the stuttering, but reduced it noticeably. When I ran ATTO on the OCZ, I was getting read/write speeds of over 161/84 Mb/s in the middle ranges (unfortunately I did not run ATTO prior to the alignment, and there's no way I'm going to go back now!). System runs much smoother than before, and is lightning fast at times. I ordered a RunCore 32GB from MDD, and plan on doing the same alignment/restore (thank God for that usb plug) of my current Mini install. Will update on results with ATTO of RunCore before and after (unless someone had already beat me to it). |
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(#17)
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(#18)
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but for the read/write time......I do like Runcores times....... Bruce |
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(#19)
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Join Date: Mar 2009
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![]() The importance of partition alignment is covered fairly well in this forum:
ssd-performance-boost-by-partition-alignment--t3438.html, as well as the OCZ forum referenced within. Basically, if the data clusters (smallest blocks, or allocation units, under NTFS) are not aligned to the drive sectors, a cluster access can overlap two sectors, thus increasing the amount of total data accessed (i.e. two whole sectors, instead of one, will need to be accessed for that one cluster). This is particularly hard with small random writes (an MLC SSD's weak area, especially in conjunction with write amplification), as the amount of overhead incurred increases in direct proportion to the amounts of clusters accessed. This inefficiency has at least two bad results: poor system performance (stuttering/pauses) during heavy disk writes, and decreased SSD life, as a 2nd sector block would have to be copied/erased/written to, in its entirety, whereas if the partition was aligned, this 2nd sector would be left untouched. The OCZ forums have great information and instructions on how to align a partition using diskpar. After performing the alignment (where the user instructs diskpar (using -s parameter) to insert an "offset" to ensure the overlaying clusters will align with the sectors), those who want to image an OS onto the new RunCore should NOT USE Acronis because it will destroy, or bypass, the "offset" he/she just put in, and he/she will have to align again and reimage (using other cloning software). As I stated, I used DriveImageXML* (free) to restore my OS, and diskpar (using -i parameter) showed the partition remained aligned. This is where you will see the usb connector on the RunCore as a godsend; my OCZ SSD had one. The alignment process is destructive, so the user will need to back up the OS (again, I recommend DriveImageXML). If the user wants to install a clean system from the CD, it can be done as usual after the alignment, but DO NOT ERASE THE PARTITION. This (partition alignment) is NOT an issue with Vista, or Windows 7, as these OS'es will do the alignment automatically upon installation. This issue does not affect all XP systems to the same degree (it's never that easy), but it did make a noticeable difference on my desktop. The principles behind it are sound, and it is a long-accepted procedure for server drives, which are subject to many random accesses. Misalignment does not affect HD's to the same extent, primarily because of the somewhat unique way in which MLC SSD's handle data writes. I'm not sure how the Mini is affected, but the STEC I have does take a while to perform writes, and the system does pause now and then. At the VERY least, partition alignment is one optimization which can only help, and it's really not all that hard to do. Hope this helps. * I inadvertently referred to this program as DiskImageXML in my 1st posting, now edited and corrected to DriveImageXML :roll: |
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(#20)
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Junior Member
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Join Date: Feb 2009
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![]() This is a great guide. This should be a sticky. I ordered my run-core 16 gig from MDD a few weeks ago and I am still waiting. I do love the mini and cant wait to take on putting os x on it. This guide will lower my stress levels significantly. Thanks.
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