mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Software

Reply
 
Thread Tools
Old 2022-10-02, 22:42   #1
ewmayer
2ω=0
 
ewmayer's Avatar
 
Sep 2002
República de California

2·32·653 Posts
Default Problem with clean MacOS reinstall

Sister gifted me a used MacPro running OS X Yosemite. I was playing with p-1 runs on it in an effort to gauge what % of the RAM was actually usable by the user. At some point I got a little too aggressive, system became unreposnsive. On my old Mac Classic I've always simply pressed and held the on/off button to force shutdown in such cases, then powered back up. On the Pro this seems to have borked something, subsequent powerup attempt gave some form of "disk error" message. After playing with various things (fsck, Disk Utility) sans success, decided to just do a clean reinstall of Yosemite from DVD.

After agreeing to license terms, get "Install OS X" splash screen, below that is a DVD icon, below that is "Select the disk on which to install" but there is no listing of disk options, nothing saying "HD" and 'continue' is grayed out. My first attempt I used Disk Utility to try to repair the borked HD, but it was unsuccessful. Some of the data must still be there, because on loading the boot DVD, the WiFi gets turned on with the usual default network settings. What to do?
ewmayer is offline   Reply With Quote
Old 2022-10-02, 23:42   #2
paulunderwood
 
paulunderwood's Avatar
 
Sep 2002
Database er0rr

22×1,093 Posts
Default

Recently, forumite rogue had a similar problem. He left the Mac turned off for several hours -- overnight? -- and it was okay the next day. Who knows what is going on. Maybe the disk needs to cool down due to excessive swapping. Maybe this is a feature of Macs.
paulunderwood is offline   Reply With Quote
Old 2022-10-06, 00:08   #3
ewmayer
2ω=0
 
ewmayer's Avatar
 
Sep 2002
República de California

1175410 Posts
Default

@Paul - thanks. Alas, overnight (and overweek) shutdown makes no difference for me. I'll likely have to bite the bullet and take to nearest Apple store with a repair department but medical appointments/paperwork/bureaucracy have once again eaten most of my waking hours this week. (Long story short, I need surgical repair of a severely leaky heart valve, and dealing with the US for-profit healthcare system is a Kafkaesque nightmare.)
ewmayer is offline   Reply With Quote
Old 2022-10-06, 03:20   #4
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

7×1,543 Posts
Default

Quote:
Originally Posted by ewmayer View Post
(Long story short, I need surgical repair of a severely leaky heart valve, and dealing with the US for-profit healthcare system is a Kafkaesque nightmare.)
Hope you get that addressed. I lost a relative to a valve that went bad. Another had one and got the replacement surgery.
Uncwilly is offline   Reply With Quote
Old 2022-10-06, 05:09   #5
VBCurtis
 
VBCurtis's Avatar
 
"Curtis"
Feb 2005
Riverside, CA

10101101011112 Posts
Default

My guess is that the disk is fried. Either that disk failure made the machine unresponsive before your power cycle, or you got rather unlucky that the power cycle cooked the disk.
VBCurtis is online now   Reply With Quote
Old 2022-10-15, 13:35   #6
leonardyan96
 
leonardyan96's Avatar
 
"Cassessory"
May 2017
Northern China

53 Posts
Default

Quote:
Originally Posted by VBCurtis View Post
My guess is that the disk is fried. Either that disk failure made the machine unresponsive before your power cycle, or you got rather unlucky that the power cycle cooked the disk.
Force shutdown might screw up an SSD. I have experienced such thing around 2015. Installing Windows 8.1 caused compatibility problems on my ThinkPad R400, so I had to long-press the power button from time to time, finally it doesn't boot. Later I pulled that drive out and connected it via an USB/SATA adapter. Once I plugged the USB in, the screen got frozen (or Windows didn't see that drive at all, my memory on this isn't accurate).

This might also depend on the quality of the drive itself. That dead drive is a cheap and poorly-built one. My current PC has an Samsung mSATA SSD in it, surviving a number of force shutdowns.

Last fiddled with by leonardyan96 on 2022-10-15 at 13:50
leonardyan96 is offline   Reply With Quote
Old 2022-10-16, 19:20   #7
kruoli
 
kruoli's Avatar
 
"Oliver"
Sep 2017
Porta Westfalica, DE

2×13×47 Posts
Default

IIRC, there was quite a big story that MacOS won't flush to disk even if explicitly told to do so, at least starting at some version. I cannot find it right now, but this might be a reason why it did what it did.
kruoli is offline   Reply With Quote
Old 2022-11-10, 22:28   #8
ewmayer
2ω=0
 
ewmayer's Avatar
 
Sep 2002
República de California

101101111010102 Posts
Default

Post-heart-surgery blizzard of phone calls and outpatient followup appointments finally subsided enough for me to have a look at this. First step was to find the proper Ifixit page for the precise Macbook Pro model in question, as the "Model A1278" on the case bottom maps to multiple iteration. Here it is. It was actually quite easy to remove the case bottom and pull the borked hard drive. Put that in an external case and USB-plugged into my older Mac Classic frozen at OSX 10.6.8 to see if that would allow me to run Disk Utility. That came up with an error along the lines of "unable to read disk format - you must use OSX 10.7.5 and above."

As it happens, my box of defunct Mac Classic chassis had one with a working 80GB HD preloaded with precisely that OSX version installed. Swapped that into the Mac Pro, it booted fine, but Disk Utility hit an internal error of some kind during Verify/Repair. Since there were no data on either HD which I particlularly needed, at that point inserted a DVD with the OSX Yosemite installer and rebooted, that needed 4-5 hours to do an install which the progress meter said would need 23 minutes, but otherwise no issues. Immediately DLed the corresponding version of Mac build tools, which yielded much newer versions of Clang/LLVM and GCC than on my Classic, tested those out by first DLing and building GNU-MP, then same for the current version of Mlucas, no problems with either.

Lastly, retried the Yosemite version of Disk Utility on the borked HD, it got further, but still eventually stopped with "unable to repair this disk." At that point I ran Erase, but that ended up failing with "unable to write to the last block of the device". No biggie - with SSD prices now in the US$0.10/GB range I'll probably buy a 120GBish SSD (don't really need more for this, but cheaper-per-GB options welcome, including cheap M.2 which one can plug into an SSD-format adapter case), use Carbon Copy Cloner to create a bootable backup copy of the 80GB HD with the Yosemite install, then swap that in for much faster boot and R/W times.
ewmayer is offline   Reply With Quote
Old 2022-11-10, 22:34   #9
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

2×5,431 Posts
Default

Quote:
Originally Posted by ewmayer View Post
Post-heart-surgery blizzard of phone calls and outpatient followup appointments finally subsided enough for me to have a look at this.
I'm presuming we are to parse that literally.

OMGs... So glad you are OK! Seriously!

There is only one of you. Take care of it.

P.S. I'm channeling all my doctors in the above, who keep telling me the job can't be completed if the human isn't around...
chalsall is offline   Reply With Quote
Old 2022-11-10, 23:58   #10
paulunderwood
 
paulunderwood's Avatar
 
Sep 2002
Database er0rr

22×1,093 Posts
Default

We are so glad your heart operation and Mac operation went well, Ernst.

I am under the knife on Wednesday to have a second operation on the other side of my face to have a bilateral Warthin tumour removed.

Last fiddled with by paulunderwood on 2022-11-11 at 00:03
paulunderwood is offline   Reply With Quote
Old 2022-11-11, 00:34   #11
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

101010011011102 Posts
Default

Quote:
Originally Posted by paulunderwood View Post
I am under the knife on Wednesday to have a second operation on the other side of my face to have a bilateral Warthin tumour removed.
I don't pray. But I trust that goes well for you. Statistically likely.

It sucks getting old... Thank the gods for the amazing medical care available nowadays.
chalsall is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Clean way of closing gpuowl? ZFR GpuOwl 1 2021-02-19 15:29
Nightly exponent clean-up in v5? NBtarheel_33 PrimeNet 1 2008-10-31 13:44
GM executive talks down clean diesel ewmayer Soap Box 1 2007-07-18 20:34
clean removal of a machine from GIMPS blackguard PrimeNet 4 2005-02-15 16:08
Resuming L-L with a clean hard drive Unregistered PrimeNet 6 2005-01-05 14:16

All times are UTC. The time now is 19:41.


Thu Dec 1 19:41:15 UTC 2022 up 105 days, 17:09, 0 users, load averages: 1.06, 1.11, 1.08

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎𝜍 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔