MTRON Limitation on ultrabay ?

[akim]

Hi all,

Can anyone tell me if there is a limitation on the ultrabay in T61P.

I have purchased another mtron mobi which I put in the ultrabay, I know my wallet is crying

Now on the first mtron as primary disk I have about 91 M/s in hdtune, and no more than 70 M/s in the ultrabay.
Strangely enough, the access time is alike on both ssd that is to say 0,1ms.

I swapped the disks and same result, if I was not laughing I would be crying

Can anyone confirm that it is the ultrabay the bottleneck and if there is a way out.

Thanks

[SHoTTa35]

well yeah you aren't getting the speeds you paid for but why would 70MB/s not be enough? I'm sure you aren't running RAID0 and copying playing music/videos or whatever from the drive doesn't need that much bandwidth so i'm curious.

I can't comment on the Ultrabay being a bottleneck since it is not supposed to be. But hey, since the drive isn't working for you let me put it in my T60 and i'll be happy with that. Right now on this 5400RPM drive i get like 40MB/s

[akim]

Hi SHoTTa35,

I think I will still keep this crappy mtron

I am intensively using virtual pc (sql 2005, visual Studio and that kind of stuff) and I feel that the performance of mtron is not what I expected.

Thank goodness, the access time is as expected but there is a bottleneck I cannot find out.

What I noticed in the mtron in the ultrabay is that it uses udma 5 although udma 6 is supported.

I long hesitated to migrate my T7700 towards T9300 for increased performance and chose to give up and purchased another mtron to put it the ultrabay, do you think that due to this result ( 70M/s ) I took the good decision ?

[erik]

for reference, the 64GB samsung SSD (MCCOE64G8MPP-0VA) from my X300 tops out at 75.5 MB/sec in the ultrabay of my X61's ultrabase.   access time is 0.3 ms.

[akim]

Congratulations on this nice stuff (x300).

Do you think Erik that the problem I am facing is lied to the ultrabay?

If the maximum throughput in your ssd (not in the ultrabay) is higher than 75,5 in the specs , it means that ultrabay is limiting the stuff.

Correct me if I am wrong.

[erik]

the last time i ran hdtune on the SSD while it was installed in the X300 it was around 95 MB/sec max.   i'm in the middle of installing server 2003, otherwise i'd re-run the test for an exact number.

either way, i agree that the limitation is in the ultrabay interface and not the drive itself.   since the ultrabay SATA adapter can be modified to work in a T4x by removing the protruding tab on the adapter, i am lead to think that the interface is limited to UDMA-5 at best.

[freakwave]

It is definitely the ultrabay.
I have the same problem on T60p. My Memoright delivers about
100MBytes/s read as primary hard drive, and about 75MByte/s in the ultrabay.

Even the primary sata controller seems to be crab (it is the intel south bridge I guess). It does not support the drives maximum of 120MBytes/s.

Wolfgang

[akim]

Thanks for this piece of information Erik.

Your test confirm without any doubt that the issue lie in the interface, do you know if there is a chance to alter the ultrabay drive connector to accomodate udma 6 or direct plug the ssd in any available sata port if any in the planar

[akim]

thanks for your remark freakwave