bxs

macrumors 65816
Original poster
Oct 20, 2007
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517
Seattle, WA
Subject: Any issue with Promise's 2Ji's disks exposed to heated air from the Processor heat sink?

I've noted that the J2i is located immediately right of the processor heat sink assembly. Thus heated air from the heat sink will be blowing over the disk(s) in the J2i holder.

Disks do not 'like' to be heated up, and this affect can/could be an issue for the J2i over time causing disk failure.

Do others see this being an issue in the cooling design for the 2Ji disks ? The Promise 4-bay MPX module is not affected by this as it has a fan blowing unobstructed air over it.

Thanks... :)
 
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majus

macrumors regular
Mar 25, 2004
247
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Oklahoma City, OK
Others have pointed that out as a potential problem too, and it does appear to be risky to put any sensitive electronics in that location. Any other solution would likely be the better choice long-term.
 
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OkiRun

macrumors demi-god
Oct 25, 2019
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Does the Promise Pegasus R4i 32TB RAID MPX Module Kit require a cable like the 2Ji disk?
 
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bxs

macrumors 65816
Original poster
Oct 20, 2007
1,141
517
Seattle, WA
Others have pointed that out as a potential problem too, and it does appear to be risky to put any sensitive electronics in that location. Any other solution would likely be the better choice long-term.
Sad... This is what I'm afraid of. How could Apple have allowed this as they obviously have worked with Promise for having this 2Ji module installed in that location. I'm guessing it is the only place for such a device for the 2Ji format.

Hmmmm..... Got to think of some way to get cooler air to the 2Ji location...
[automerge]1576647122[/automerge]
Does the Promise Pegasus R4i 32TB RAID MPX Module Kit require a cable like the 2Ji disk?
Requires no cable like for the 2Ji. It fits into a PCIe slot (MPX bay) according to the attached image.
 
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tsialex

macrumors G3
Jun 13, 2016
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Sad... This is what I'm afraid of. How could Apple have allowed this as they obviously have worked with Promise for having this 2Ji module installed in that location. I'm guessing it is the only place for such a device for the 2Ji format.

Hmmmm..... Got to think of some way to get cooler air to the 2Ji location...
Most HDDs are rate to work up to 52ºC, some even more. I seriously doubt that the heatsink can heat enough the flow of air going to the HDD, the air is constantly circulating.
 
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bxs

macrumors 65816
Original poster
Oct 20, 2007
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Seattle, WA
Most HDDs are rate to work up to 52ºC, some even more. I seriously doubt that the heatsink can heat enough the flow of air going to the HDD, the air is constantly circulating.
Well, I hope you're right as I've opted for the 2Ji to provide me internal bulk data storage at a reasonable price. I plan on having 2x 16TB in the 2Ji. I wonder if something like iStat can record and display temperatures inside the case at various points ?
 
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AidenShaw

macrumors P6
Feb 8, 2003
18,667
4,672
The Peninsula
I wonder if something like iStat can record and display temperatures inside the case at various points ?
S.M.A.R.T. reports disk temperatures, so use any tool that does S.M.A.R.T.

Code:
190 Airflow_Temperature_Cel 0x0022   061   049   040    Old_age   Always       -       39 (Min/Max 25/42)
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       2
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       7
194 Temperature_Celsius     0x0022   039   043   000    Old_age   Always       -       39 (0 23 0 0 0)

It's also likely that bulk storage will be spun down most of the time.
 
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bxs

macrumors 65816
Original poster
Oct 20, 2007
1,141
517
Seattle, WA
Thanks All.... Time will tell us if the 2Ji survives the heated air flow from the processor heat sink. I will certainly allow for the 2Ji's disks to spin down when not needed.

I have several disk monitoring applications that monitor and report S.M.A.R.T stats so will be using these periodically.

Again, thanks. ?
 
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