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  1. #1


    Member Since
    May 20, 2010
    Posts
    5
    Problem Saving Large File
    I've been having problems trying to backup a 5.86 GB file on any type of external drive from an iMac running MacOS-X Snow Leopard. Please excuse my ignorance, I'm not very computer savvy. When I'm trying to transfer the file, it stops midway and this is the error message that I get word-for-word:

    Failed Backup: mysqldump:
    Got errno27 on write: This
    backup is incomplete. It is
    recommended that you create
    a new backup.

    Hopefully someone will have an idea about what I can do to solve this problem. I would really appreciate a response in layman's "dummies" terms.
    Thanks!

  2. #2

    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,812
    Specs:
    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Air 2, New AppleTV (4?)
    How are you trying to back it up? Are you using an application or just copying the file using finder?

    The problem is most likely the way your external is formatted.

    Connect it to your mac and open Disk Utility. Click on your external drive on the left pane of the disk utility window and the panel at the bottom will give you info about the disk. What does it say next to Format ?
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

  3. #3

    CrimsonRequiem's Avatar
    Member Since
    Jul 24, 2008
    Posts
    6,004
    Specs:
    MBP 2.3 Ghz 4GB RAM 860 GB SSD, iMac 3.4 GHz Intel Core i7 32GB RAM, Fusion Drive 1TB
    Most likely FAT32. It has a 4GB limit on files that can be copied onto the disk.
    死神はリンゴしか食べない。

  4. #4


    Member Since
    May 20, 2010
    Posts
    5
    Thank you for your replies.

    I am trying to back it up directly from MacPractice to the flash drive. When I look in Disk Utilities next to Format it says: MS-DOS (FAT 32).

    CrimsonRequiem, is there any way around that 4GB limit? I have read through a google search that you can reformat (supposedly a pain in the butt) or you can download a program that will basically break your file up into smaller parts so that you can put them on your external and then put them all back together somehow (also sounds like a PITB)!

  5. #5

    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,812
    Specs:
    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Air 2, New AppleTV (4?)
    If it's just going to be used purely on Macs then just format the drive (in Disk Utility) to one on the Mac formats. They all handle 4gb+ file sizes.

    If you need to keep Mac & Windows compatibility then you'll need to format to NTFS.

    The simplest way is to format the drive with NTFS is on the windows machine then use NTFS Mounter to enable writing to NTFS in Snow Leopard.
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

  6. #6


    Member Since
    May 20, 2010
    Posts
    5
    Grateful, I am mrplow. Try that, I will

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