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<p>Just for you I pulled a powered up drive out of the USB dock and
risked my data.<br>
</p>
<p>I got emailed instantly.<br>
</p>
<p>This is from /var/log/kern.log<br>
</p>
<p>Aug 21 17:41:02 mach1 kernel: [255336.724544] sd 6:0:0:0: [sde]
Synchronizing SCSI cache<br>
Aug 21 17:41:02 mach1 kernel: [255336.725244] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.725246] md/raid10:md125:
Disk failure on sde1, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.725246] md/raid10:md125:
Operation continuing on 3 devices.<br>
Aug 21 17:41:02 mach1 kernel: [255336.725332] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.725333] md/raid10:md124:
Disk failure on sde2, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.725333] md/raid10:md124:
Operation continuing on 3 devices.<br>
Aug 21 17:41:02 mach1 kernel: [255336.812856] sd 6:0:0:1: [sdf]
tag#25 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK<br>
Aug 21 17:41:02 mach1 kernel: [255336.812858] sd 6:0:0:1: [sdf]
tag#25 CDB: Synchronize Cache(10) 35 00 00 00 00 00 00 00 00 00<br>
Aug 21 17:41:02 mach1 kernel: [255336.812875] print_req_error: I/O
error, dev sdf, sector 2064 flags 20801<br>
Aug 21 17:41:02 mach1 kernel: [255336.812878] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.812880] md/raid10:md125:
Disk failure on sdf1, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.812880] md/raid10:md125:
Operation continuing on 2 devices.<br>
Aug 21 17:41:02 mach1 kernel: [255336.912850] sd 6:0:0:1: [sdf]
tag#27 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK<br>
Aug 21 17:41:02 mach1 kernel: [255336.912852] sd 6:0:0:1: [sdf]
tag#27 CDB: Synchronize Cache(10) 35 00 00 00 00 00 00 00 00 00<br>
Aug 21 17:41:02 mach1 kernel: [255336.912855] print_req_error: I/O
error, dev sdf, sector 1953515536 flags 20801<br>
Aug 21 17:41:02 mach1 kernel: [255336.912857] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.912859] md/raid10:md124:
Disk failure on sdf2, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.912859] md/raid10:md124:
Operation continuing on 2 devices.<br>
</p>
<p>This is from syslog<br>
</p>
<p>Aug 21 17:41:02 mach1 kernel: [255336.720913] usb 2-7: USB
disconnect, device number 14<br>
Aug 21 17:41:02 mach1 kernel: [255336.724544] sd 6:0:0:0: [sde]
Synchronizing SCSI cache<br>
Aug 21 17:41:02 mach1 kernel: [255336.725244] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.725246] md/raid10:md125:
Disk failure on sde1, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.725246] md/raid10:md125:
Operation continuing on 3 devices.<br>
Aug 21 17:41:02 mach1 kernel: [255336.725332] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.725333] md/raid10:md124:
Disk failure on sde2, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.725333] md/raid10:md124:
Operation continuing on 3 devices.<br>
Aug 21 17:41:02 mach1 kernel: [255336.812856] sd 6:0:0:1: [sdf]
tag#25 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK<br>
Aug 21 17:41:02 mach1 kernel: [255336.812858] sd 6:0:0:1: [sdf]
tag#25 CDB: Synchronize Cache(10) 35 00 00 00 00 00 00 00 00 00<br>
Aug 21 17:41:02 mach1 kernel: [255336.812875] print_req_error: I/O
error, dev sdf, sector 2064 flags 20801<br>
Aug 21 17:41:02 mach1 kernel: [255336.812878] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.812880] md/raid10:md125:
Disk failure on sdf1, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.812880] md/raid10:md125:
Operation continuing on 2 devices.<br>
Aug 21 17:41:02 mach1 kernel: [255336.912850] sd 6:0:0:1: [sdf]
tag#27 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK<br>
Aug 21 17:41:02 mach1 kernel: [255336.912852] sd 6:0:0:1: [sdf]
tag#27 CDB: Synchronize Cache(10) 35 00 00 00 00 00 00 00 00 00<br>
Aug 21 17:41:02 mach1 kernel: [255336.912855] print_req_error: I/O
error, dev sdf, sector 1953515536 flags 20801<br>
Aug 21 17:41:02 mach1 kernel: [255336.912857] md: super_written
gets error=10<br>
Aug 21 17:41:02 mach1 kernel: [255336.912859] md/raid10:md124:
Disk failure on sdf2, disabling device.<br>
Aug 21 17:41:02 mach1 kernel: [255336.912859] md/raid10:md124:
Operation continuing on 2 devices.<br>
</p>
<p>Before failure:<br>
</p>
<p>$ cat /proc/mdstat<br>
Personalities : [raid0] [linear] [multipath] [raid1] [raid6]
[raid5] [raid4] [raid10]<br>
md124 : active raid10 sdf2[5] sde2[4] sdc2[6] sdd2[7]<br>
1953251328 blocks super 1.2 512K chunks 2 near-copies [4/4]
[UUUU]<br>
bitmap: 0/15 pages [0KB], 65536KB chunk<br>
<br>
md125 : active raid10 sdf1[3] sde1[1] sdd1[5] sdc1[4]<br>
1953251328 blocks super 1.2 512K chunks 2 near-copies [4/4]
[UUUU]<br>
bitmap: 0/15 pages [0KB], 65536KB chunk<br>
<br>
unused devices: <none><br>
</p>
<p>After failure<br>
</p>
<p>$ cat /proc/mdstat<br>
Personalities : [raid0] [linear] [multipath] [raid1] [raid6]
[raid5] [raid4] [raid10]<br>
md124 : active (auto-read-only) raid10 sdc2[6] sdd2[7]<br>
1953251328 blocks super 1.2 512K chunks 2 near-copies [4/2]
[U_U_]<br>
bitmap: 0/15 pages [0KB], 65536KB chunk<br>
<br>
md125 : active (auto-read-only) raid10 sdd1[5] sdc1[4]<br>
1953251328 blocks super 1.2 512K chunks 2 near-copies [4/2]
[U_U_]<br>
bitmap: 0/15 pages [0KB], 65536KB chunk<br>
<br>
unused devices: <none></p>
<p><br>
</p>
<div class="moz-cite-prefix">On 8/21/19 4:25 PM, Jeff Frontz wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAGvwsDk6EExmuZwGZn40x46hqR0ARmkHuOQnYCioPDs0SWxbGQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div dir="ltr"><br>
</div>
Thanks, Judd -- when the raid failed, were there any
syslog/journald messages indicating such?
<div><br>
</div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Aug 21, 2019 at
2:41 PM Judd Montgomery <<a
href="mailto:judd@engineer.com" moz-do-not-send="true">judd@engineer.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p> I setup md with raid-0, 5 and 10 (tried them all,
just playing) with 4 drives. It would occasionally
get corrupted. I tracked it down to when the 2 docks
were turned on in a certain order the kernel would
bounce one of them and cause the raid to fail.<br>
</p>
</div>
</blockquote>
</div>
</div>
</div>
<br>
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