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Velociraptor not faster than IDE Drive in my G4

Hi,


I connected a WD Velociraptor 150GB HLFS via an SATA-IDE Adapter to the onboard controller of my PowerMac G4. I notice that opening folders takes about the same (felt) time as with the IDE drive.


I used a SATA-IDE adaptor for about 15-18,-EUR instead of a china thing from Ebay for 3-5,-EUR incl. shipping. It has a Jumper, too. But I guess it could still be the adapter, huh?

PowerMac, Mac OS X (10.4.11), PowerMac G4 AGP or Gigabit Ethernet

Posted on Mar 16, 2013 4:47 PM

Reply
42 replies

Mar 23, 2013 7:16 PM in response to Csound1

But why, do I see folders opening faster using the SATA-PCI-Card and a SATA drive, which is not a SSD? My assumption: the SATA-to-IDE adaptor on the ATA-66 BUS, must have problems handing the information though.


The ATA/66 bus is slower than the PCI bus.

Folder action is also limited by the memory bus.


SSD "tactile" performance is indiscernable from a rotational SATA drive (either on PCI).

This is from actual experience with the setup in G4 Sawtooth, G4 Gigabit Ethernet and G4 Quicksilver machines.


Benchmarking software test resuts are as I documented. Though faster, SSD performance isn't "visibly" faster than rotational SATA via PCI.


As someone who does use a SSD in a G4, when someone suggests using a SSD in a G4, I say don't waste the effort or the money if performance beyond a standard SATA drive is expected....


You won't see it.

Mar 23, 2013 7:12 PM in response to Csound1

Csound1 wrote:

You are discounting the time required to traverse the connection (not to mention the IDE to Sata translation inherent in a bridged connection)

That is an incorrect accumption. Such time would also be equal with the Velociraptor.

Meaning, in addition to the 4ms seek time, you will have a 6ms seek time as compared to a 2.1ms seek time with an SSD.


In your example, an SSD will still find and open folders 3 times faster than the Velociraptor.

Mar 23, 2013 7:17 PM in response to japamac

japamac wrote:

say don't waste the effort or the money if performance beyond standard SATA drives is expected....

Thank you for your opinion, but your opinion is false. As a user of multiple PowerPC macs with SSDs (G3 233 beige tower, G4 AGP, Mini 1.4GHz, G5 2.3 dual core and G5 Quad) I know for a fact there is a tactile and measurable difference in OS responsiveness.


Combined with the fact SSDs are available for under $75 and will be usable in any future Mac you purchase (PPC or otherwise), there is no reason NOT to buy one if you want your computer to be as responsive as possible.


The difference is even more significant when installed in Macs with 2.5" drives like laptops and Minis.

Mar 23, 2013 7:24 PM in response to Electricidad

A Velociraptor has a seek time of 4ms while any SSD has a seek time of less than 0.1ms.

That means the OS and drive will be able to locate and open folders 40 times faster

Again, measurable in practice, invisible to the senses.

One cannot see the 3.6ms difference, especially when it is choked down by other components in the chain.

Mar 23, 2013 7:49 PM in response to japamac

japamac wrote:

Again, measurable in practice, invisible to the senses.

Thank you for your subjective opinion, but you are clearly wrong in this case. It has been proven by hundreds of thousands of SSD sales and hundreds of objective tests that SSD drives both outperform and respond faster than HDD drives with the only downside being $/GB.


japamac wrote:

One cannot see the 3.6ms difference, especially when it is choked down by other components in the chain.

Also incorrect. It is clearly visible when opening folders, especially if "calculate all sizes" and/or "show icon preview" is enabled.


A single instance of 2.1ms is hardly noticeable, but combined with the fact that OSX has over 128,000 files/folders under 64kb adds up.

When measuring combinations of loads, such as opening a folder which is not empty, every one of those instances add up.

Say you've got a folder with 20 items. Thats 1 folder, 20 items, 20 size calculations and 20 icons. That all adds up to 128.1ms for the folder to finish loading on an SSD ccompared to 366ms for the Velociraptor. That is VERY noticeable by the human eye and senses.


I would not have installed an SSD boot/app drive in every single one of my Macs if there was no benefit as you claim.


Your opinions suggest that you're simply afraid of new technology and unwilling to embrace advancements made over your established hardware. Perhaps the fear of being obsolete or supplanted?

Mar 23, 2013 10:54 PM in response to steve359

steve359 wrote:

Your mother already called "bedtime", young man.

Please read the TOS again: https://discussions.apple.com/static/apple/tutorial/tou.html


2. Be polite. Everyone should feel comfortable reading Submissions and participating in discussions. Apple will not tolerate flames or other inappropriate statements, material, or links. Most often, a "flame" is simply a statement that is taunting and thus arbitrarily inflammatory. However, this also includes those which are libelous, defamatory, indecent, harmful, harassing, intimidating, threatening, hateful, objectionable, discriminatory, abusive, vulgar, obscene, pornographic, sexually explicit, or offensive in a sexual, racial, cultural, or ethnic context.

Mar 26, 2013 1:05 PM in response to Electricidad

two days ago, there was a third page. Now, when I go directly to it via my email notification, I get "unauthorized".


Some Apple Admninistrator, did think this is a flame war, and deleted the third page, but left the whole page 2 intact, where you can still read maybe "problematic" posts.


The big problem I have with that is, that on page three I comitted something to the topic and I translated a german text into english. Now the knowledge and my work of translation is gone. Well done Apple!


It seems they don't delete content sensitive.


In the "unauthorized message I get after log-in, there it says "if you find this is wrong, please contact your administrator". I would love to, but there is no way I can find an administrator. Hm, so I guess I am stupid and have to live with that and will never get an answer, why my helpful post, which was on topic and not reffering to anybody or flaming against anybody, is gone.

Velociraptor not faster than IDE Drive in my G4

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