<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div><b>From: </b>"Claudio Kuenzler" <napsty@gmail.com><br></div><div data-marker="__HEADERS__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>To: </b>"Roy Sigurd Karlsbakk" <roy@karlsbakk.net><br><b>Cc: </b>"smartmontools-support" <smartmontools-support@listi.jpberlin.de><br><b>Sent: </b>Wednesday, 4 May, 2022 06:55:02<br><b>Subject: </b>Re: [smartmontools-support] SAS drives output<br></blockquote></div><div data-marker="__QUOTED_TEXT__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 4, 2022 at 12:44 AM Roy Sigurd Karlsbakk via Smartmontools-support <<a href="mailto:smartmontools-support@listi.jpberlin.de" target="_blank">smartmontools-support@listi.jpberlin.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
With SAS, however, its the amount of data available is a lot less [2]. </blockquote><br><div>Yep. SAS (SCSI) is not ATA, therefore these are different kind of drives. The SMART table as you know it (with the attribute listing) is only present in ATA drives.<br></div><div> <br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
It's just strange - I would have thought SAS, being faster, better, more expensive et cetera et cetera ad infinitum, would also deliver the same amount of data over SMART or similar, but it doesn't look like that. Does SAS have an alternate method of reading this out or is the data actually omitted or concealed?<br></blockquote><br>Understandable, but that's just it. I doubt there is any additional data in the SAS drives which smartctl is not reading.<br></div></div>
</blockquote></div><div data-marker="__QUOTED_TEXT__"><div>According to this post, <a href="https://superuser.com/questions/618736/how-do-i-interpret-smart-data-for-sas-disks," data-mce-href="https://superuser.com/questions/618736/how-do-i-interpret-smart-data-for-sas-disks,">https://superuser.com/questions/618736/how-do-i-interpret-smart-data-for-sas-disks,</a> "Correction algorithm invocations" as reported by smartctl -l error could give a pointer to potential issues like those found with various other attributes on SATA.<br></div><div><br></div><div>It also seems rewrites correlates to total corrected errors and Correction algorithm invocations except for rereads which seems to be nother story altogether.</div><div><br></div><div>Short summary over the SAS drives i my system with Correction algorithm invocations > 0<br></div><div><br></div>=== START OF READ SMART DATA SECTION ===<br>Error counter log:<br> Errors Corrected by Total Correction Gigabytes Total<br> ECC rereads/ errors algorithm processed uncorrected<br> fast | delayed rewrites corrected invocations [10^9 bytes] errors<br>============ /dev/sdo ============<br>[R] read: 1890693855 27 0 1890693882 27 561825.247 0<br>[W] write: 0 0 0 0 0 274268.491 0<br>============ /dev/sdq ============<br>[R] read: 1767968645 2 0 1767968647 2 563629.638 0<br>[W] write: 0 0 0 0 0 265845.517 0<br>============ /dev/sdu ============<br>[R] read: 1548213289 88 0 1548213377 88 13739.072 0<br>[W] write: 0 0 0 0 0 22122.154 0<br>============ /dev/sdv ============<br>[R] read: 3347515306 0 0 3347515306 0 556018.523 0<br>[W] write: 0 0 7 7 7 269312.240 0<br>============ /dev/sdah ============<br>[R] read: 3912943842 0 0 3912943842 0 657862.876 0<br>[W] write: 0 0 1 1 2 1264878.422 1<br>============ /dev/sdan ============<br>[R] read: 3504925953 76 0 3504926029 76 571224.984 0<br>[W] write: 0 0 0 0 0 266987.398 0</div><div data-marker="__QUOTED_TEXT__"><div data-marker="__SIG_PRE__">Vennlig hilsen<br><br>roy<br>-- <br>Roy Sigurd Karlsbakk<br>(+47) 98013356<br>http://blogg.karlsbakk.net/<br>GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt<br>--<br>Hið góða skaltu í stein höggva, hið illa í snjó rita.</div></div></div></body></html>