Large USB Transfer rate significantly slower on Ubuntu 24.04

[Lee]

Writing more than 5 GB to a USB thumbdrive is much slower on 24.04 when compared to 22.04. What action might bring the transfer rate on 24.04 in line with that observed on 22.04?

Using hardware of identical configuration (Dell 7020 desktop), one loaded with Xubuntu 22.04, the other with Xubuntu 24.04 and two identical thumb drives. The thumb drives are formatted NTFS and cleaned prior to each test run. The thumb drives are referred to here as PEACH and ARCTIC. The data being copied resides in several files on the primary harddrive of each system. The size of each file ranges from a few bytes to one at 3.3GB.

22.04 took 9 minutes to ARCTIC and 10 minutes to PEACH
24.04 took 127 minutes to ARCTIC and 142 minutes to PEACH

At first, 24.04 was reporting the copy function complete quite a bit faster than that measured on 22.04. Once the accumulated total of data reported copied reached about 5GB, 24.04 became very slow.

An additional pair of runs was made using PEACH after adding the command sync just prior to completion. Those run results are:

22.04 took 30 minutes total with sync - sync itself took 21 minutes
24.04 took 175 minutes total with sync - sync itself took 10 minutes

A similar thumbdrive, formatted ext4 took 47 minutes on 24.04 of which the sync was 10 minutes. This same ext4 formated drive took 34 minutes of which the sync was 11 minutes.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-35-generic 6.8.0-35.35+1
ProcVersionSignature: Ubuntu 6.8.0-35.35-generic 6.8.4
Uname: Linux 6.8.0-35-generic x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D8p', '/dev/snd/hwC0D0', '/dev/snd/controlC0', '/dev/snd/by-path', '/dev/snd/pcmC1D0p', '/dev/snd/pcmC1D0c', '/dev/snd/hwC1D0', '/dev/snd/controlC1'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
CurrentDmesg: Error: command ['pkexec', 'dmesg'] failed with exit code 127: pkexec must be setuid root
Date: Thu Jun 13 08:47:59 2024
InstallationDate: Installed on 2024-04-28 (46 days ago)
InstallationMedia: Xubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424.2)
IwConfig:
 lo no wireless extensions.

 eno1 no wireless extensions.
MachineType: Dell Inc. OptiPlex 7020
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-35-generic root=UUID=3ea69b3f-1462-4210-92e2-3262197b4b4f ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-6.8.0-35-generic N/A
 linux-backports-modules-6.8.0-35-generic N/A
 linux-firmware 20240318.git3b128b60-0ubuntu2
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
acpidump: Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed with exit code 127: pkexec must be setuid root
dmi.bios.date: 09/13/2015
dmi.bios.release: 65.7
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0F5C5X
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd09/13/2015:br65.7:svnDellInc.:pnOptiPlex7020:pvr00:rvnDellInc.:rn0F5C5X:rvrA00:cvnDellInc.:ct6:cvr:sku05A5:
dmi.product.name: OptiPlex 7020
dmi.product.sku: 05A5
dmi.product.version: 00
dmi.sys.vendor: Dell Inc.