6/30/16 7:24:54.504 PM com.apple.backupd[1050]: Starting manual backup
6/30/16 7:24:54.505 PM com.apple.backupd[1050]: Attempting to soft mount network destination URL: afp://nsayer@chronos._afpovertcp._tcp.local./Backups
6/30/16 7:24:58.641 PM com.apple.backupd[1050]: Mounted network destination at mount point: /Volumes/Backups using URL: afp://nsayer@chronos._afpovertcp._tcp.local./Backups
6/30/16 7:24:59.395 PM com.apple.backupd[1050]: Network destination already mounted at: /Volumes/Backups
6/30/16 7:25:28.970 PM com.apple.backupd[1050]: Creating disk image /Volumes/Backups/arachne.sparsebundle
6/30/16 7:26:11.922 PM com.apple.backupd[1050]: Cannot make directory /Volumes/Backups/arachne.tmp/bands: Invalid argument
6/30/16 7:26:16.190 PM com.apple.backupd[1050]: Error moving disk image from /var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/com.apple.backupd.lXLK8q/arachne.tmp.sparsebundle to /Volumes/Backups/arachne.sparsebundle - Error Domain=NSCocoaErrorDomain Code=512 "“arachne.tmp” couldn’t be moved to “Backups”." UserInfo={NSDestinationFilePath=/Volumes/Backups/arachne.tmp, NSUserStringVariant=Move, NSFilePath=/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/com.apple.backupd.lXLK8q/arachne.tmp.sparsebundle, NSUnderlyingError=0x7fc782e05b80 {Error Domain=NSCocoaErrorDomain Code=512 "“bands” couldn’t be copied to “arachne.tmp”." UserInfo={NSSourceFilePathErrorKey=/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/com.apple.backupd.lXLK8q/arachne.tmp.sparsebundle/bands, NSUserStringVariant=(
    Copy
), NSDestinationFilePath=/Volumes/Backups/arachne.tmp/bands, NSFilePath=/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/com.apple.backupd.lXLK8q/arachne.tmp.sparsebundle/bands, NSUnderlyingError=0x7fc782e03650 {Error Domain=NSPOSIXErrorDomain Code=22 "Invalid argument"}}}}
6/30/16 7:26:16.191 PM com.apple.backupd[1050]: Failed to create disk image /Volumes/Backups/arachne.sparsebundle, status: 512
6/30/16 7:26:16.192 PM com.apple.backupd[1050]: Network destination already mounted at: /Volumes/Backups
6/30/16 7:26:16.192 PM com.apple.backupd[1050]: Backup failed with error 20: 20
6/30/16 7:26:18.705 PM com.apple.backupd[1050]: statfs call failed, error: 2 No such file or directory
6/30/16 7:26:18.717 PM com.apple.backupd[1050]: Ejected Time Machine network volume.